Gleaner Heights

For this event to trigger, you need to go to their house between 22:00 and 24:00 hours.

This is probably the first achievement you will get but you can miss it if you never go by their house at night.

Their house is to the southwest from the main square, right from the big farm.

After triggering the event from Saw your abuse, you need to get Matilda's friendship heart to max level.

This is a small chart of her likes/dislikes so you can gift her enough items to get her to max trust.

Matilda ❤* Su 28; Golden long hair, yellow shirt, red pants, Lee's wife
Loves: Diamond, Emerald, Pearl, Spaghetti bolognese
Likes: Strawberry, Zircon, Peanut butter, French fries, Green salad
Neutral: Nightflower, Quartz, Carrot, Gold, Malachite, Ruby, Fire Opal, Saltpetre, Okra, Sugar, Tomato, Hop, Corn, Kiwi, Honey, Minnow, Raspberry, Pepper
Hates: Saltpetre, Stone, Weed
Rewards: Hint about abusing event, Spring Vegetable Stew recipe, Hint to unlock marriage candidacy
Source: https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1728804940

Building the playground increases everyone's trust, so if you have cash to spare, you might want to build that by using the ledger of projects in the mayor's office.

Since a kitchen will be too expensive, your best bet to get this done quick is to mine for resources in the mine that is located to the northeast of the town, emeralds and zircons are abundant past Floor 30.

If you are not powerful enough, just gift her anything that she does not hate for the time being.

Once she has her first star, talk to her while she is in the town center near the fountain, she will hint that she needs help.

Continue with the gifts until she has 3 stars and then talk to her again outside her house, she will ask for help.

If you refuse here, you wont be able to unlock any of the achievements.

Agree to meet her at night, go to her house between 20:00 and 21:00 hours, the key is being at her house without Lee being around.

You will have a choice, if you decide to stay inside, you wont be able to unlock the achievements.

A fight will ensue, if you have decent protection: Wood Set or Warlord Set, anything above 50, he wont be able to harm you much.

You can bring black herbs that you collected from the mine to the fight if you wish.

Once the fight is over, leave to get this particular achievement.

If you hit him again, you will kill him and get Husband killer instead.

If you decide to kill Lee, you wont be able to get Mushroom dealer

Killing Lee will give you a sin.

If you get to the end of the game without a Sin, you can unlock Annie's fine.

You need at least 2 sins to trigger That was me at the end of the game.

Dont worry, after the plot continues, you will be asked if you want to save the game, if you still need the other achievement, choose No and start the day over to get the other achievement.

Hope this helps!

The Mole King is the boss at the end of the mine at Floor 40.

He is one of the easiest bosses if you have decent protection and weapon offense.

A gold hammer will do just fine to battle him along with Wood Armor Set.

To unlock the wood armor set, befriend Kain, the lumberjack (NE from your farm, in the small forest) by giving him Fences or Gold which he likes, he loves Boar Hides which you can get in the forest west of your farm from, well, boars. (rare drop)

To craft a gold hammer, you need to first have copper and your regular hammer in your inventory and 5k monies. (Which you can get by mining) then visit Lazarus SW from your farm in a wooden cabin, he is the blacksmith. After you get the Copper Hammer, return to him with 1 piece of gold and 10k monies.

Getting the armor is priority so you can survive to Floor 25 where the little robots spawn, these robots drop bombs which you can quickly pick up and throw at a wall so you can mine that way, since time does not pass indoors, you can get your loot, go back to put it in the box and return to the mine.

Once ready, confront the mole king which will summon enemies to hinder you, ignore them and focus on killing the king, once his health is gone, all enemies die.

Cheers.

This boss is a special one since you can only unlock him if you know of the hidden basement below your workshop.

The workshop is the building north from the watering hole in your farm, where a crafting table is located.

To the right of the table, you will see something strange in the floor, smash it with your hammer to reveal a hidden ladder.

Go down and find a small robot which will quickly run away, follow him.

The robot will open a new cave in the forest west of your farm, inside you will have to defeat all enemies in a room so the next door opens and you can proceed.

To prepare for this fight, you need at least a gold weapon and a good protection set, I suggest a golden hammer and the wood set from kain.

To unlock the wood armor set, befriend Kain, the lumberjack (NE from your farm, in the small forest) by giving him Fences or Gold which he likes, he loves Boar Hides which you can get in the forest west of your farm from, well, boars. (rare drop)

To craft a gold hammer, you need to first have copper and your regular hammer in your inventory and 5k monies. (Which you can get by mining) then visit Lazarus SW from your farm in a wooden cabin, he is the blacksmith. After you get the Copper Hammer, return to him with 1 piece of gold and 10k monies.

Getting the armor is priority so you can survive to Floor 25 where the little robots spawn, these robots drop bombs which you can quickly pick up and throw at a wall so you can mine that way, since time does not pass indoors, you can get your loot, go back to put it in the box and return to the mine, this way you can get the monies.

Once ready, go into the cave and fight your way through, the knight has several attacks which you can read on here: https://gleaner-heights.fandom.com/wiki/Automaton_Knight

Good luck!

To unlock this event, you need to get Michael to 1 star so he trusts you enough to tell you about Alice's addiction.

Here is a small chart to help you gain his trust

Michael ❤* W23; Brown boots, brown vest, grey pants, Alice's husband
Loves: Watermelon, Watermelon Jam, Watermelon Juice, Watermelon Milkshake, Rhubarb scones, Tortilla
Likes: Raw Meat, Rhubarb, Fried egg, Pancakes, Spinach and rice, Fish and chips, French fries, Pineapple, Silver
Neutral: Apple, Battery, Boar Hide, Boot, Carrot, Copper, Corn, Diamond, Emerald, Egg (G), Fence, Fire Opal, Gold, Green Herb, Hop, Lithium, Mushroom, Nightflower, Octotinium, Okra, Pearl, Raspberry, Ruby, Silicon, Stone, Tomato, Turnip, Wood, Zircon, Kiwi, Carp, Pepper, Power Cell, Strawberry
Hates: Fat, Lettuce, Milk, Cake
Rewards: Hint to unlock marriage candidacy, Octotinium, Pepper egg in a hole recipe

Easiest way is to gift him Silver since you will be mining a lot, you can also give him meat from boars you can hunt at the west forest.

Once that done, go west of the town's square at 21:00 hours, this might only trigger on a saturday but Im not sure.

You will see Alice drunk then, and the achievement will unlock.

During Summer, wait until night, around 21:00 and go to the front of the hotel, Tobias will be in trouble.

If you help him by interacting with the rope, you will get the achievement I've got you there

If you use a tool to HIT on the rope/log instead, Tobias will fall to his dead and you will get Goodbye old fool

If you decide to kill Tobias without having 3 stars with him and getting the dynamite recipe, you wont be able to get the game's ending.

Killing Tobias will give you a sin.

If you get to the end of the game without a Sin, you can unlock Annie's fine.

You need at least 2 sins to trigger That was me at the end of the game.

Cheers!

After having a two star friendship with either Garry or Regina (or maybe both?) go to their house between 19:00 and 21:00.

That will unlock the achievement.

If you go inside and talk to them you will have three choices: Just chat, talk about the debt or to not talk about the debt.

Just chat works like a normal talk interaction.

If you decide to talk about the debt and have 10000 monies, you can pay their debts and they will be grateful, you can unlock the siblings as romance partners.

Choosing the option to not talk about the debt will permanently remove the choices and you wont be able to help them.

Walking away with just chatting or not having enough money, will postpone this until you decide what to do.

Cheers.

In the southeastern corner of the town map is a cave blocked by vines.

These vines regenerate if you try to slash them, to open the cave you will need acid.

To get access to the Acid Cave where you can use your watering pot tool to fill it with acid, you need to destroy an old tree stump in the western forest, where the hedgehogs are (southeastern part of western forest).

To destroy the stump, you need an Octotinium Axe which can be upgraded at the blacksmith, from normal to copper, from copper to gold and from gold to octotimium.

You will need 30,000 monies to fully upgrade a tool and one ore of each (copper, gold, octotinium)

Once you use the acid to open the cave, go in and get through to the other side, dont worry, there are no enemies here.

Once you enter the villa's basement, the achievement should unlock.

Fun fact: Use your hammer to destroy the middle wall in the second room of the villa, the room where the old wine barrels are, for the achievement In pace requiescat

The Last Smuggler is an underwater boss that can be found in a cave reachable only you have access to the boat and the diving suit.

First, you need to go to the mayor's house and look at the project ledger, choose to repair the Pier, this will cost 20,000 monies.

Second, you need a Diving suit, you need to befriend Ken to maximum level so he gives you the blueprints to craft a diving suit.

Here is a small chart showing what Ken likes/hates so you can gain his trust quicker:

Ken ❤ W9; Blonde hair, yellow shirt, brown coveralls, Son of Lazarus the blacksmith, enjoys mining
Loves: Octotinium, Restoration potion, Apple crumble, Parsnip and cauliflower soup
Likes: Gold, Nightflower, Fire opal, apples, Fried Meat, Roasted Corn, Omelette, Spinach and rice
Neutral: Green Herb, Kale, Saltpeter, Meat, Fat, Cucumber, Okra, Strawberry, Tomato, Silver, Copper, Corn, Pepper, Raspberry
Hates: Fence, Fishbones, Milk, Onion, Kiwi jam, Kiwi juice, Kiwi milkshake
Rewards: Info about Blacksmith's event, +1 Mining Skill, Dive Suit
source: https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1771680812

Once you have the plans, you need to craft it, you will need:

1. 20 iron
2. 14 copper
3. 4 fat
4. 2 quartz
5. You can get fat from slimes and boars, they are an uncommon drop, the other ingredients from the mine or robot enemies.

Once you have the diver's suit, go to the pier (south of the mine) and get on the boat, sail left towards the waterfall and go to the NW corner, you should be on the patch of water between the lumberjack's house and the waterfall. Dive here and you will see a cave, adjust your position so when you dive, you fall nearby the cave entrance.

If you miss the dive, cancel and try again. To cancel, press the C key or the back button on the controller.

Once inside, get ready for a fight.

You should have at least a gold tool weapon and the warlord set that you can get off the forest area accessible through the second pier to the east once you get the boat.

The fight is pretty straightforward, just hit it in the head until it dies, heal with black herbs from the mine if you need to.

Once its dead, the achievement will unlock, good job!

Cheers!

In the southeastern corner of the town map is a cave blocked by vines.

These vines regenerate if you try to slash them, to open the cave you will need acid.

To get access to the Acid Cave where you can use your watering pot tool to fill it with acid, you need to destroy an old tree stump in the western forest, where the hedgehogs are (southeastern part of western forest).

To destroy the stump, you need an Octotinium Axe which can be upgraded at the blacksmith, from normal to copper, from copper to gold and from gold to octotimium.

You will need 30,000 monies to fully upgrade a tool and one ore of each (copper, gold, octotinium)

Once you use the acid to open the cave, go in and get through to the other side, dont worry, there are no enemies here.

Use your hammer to destroy the middle wall in the second room of the villa, the room where the old wine barrels are, enter the room and the achievement will pop.

The Slime Lord can be found in the Boar Cave in the West Forest, to get to him you will need an Octotunium Hammer which can be upgraded at the blacksmith, from normal to copper, from copper to gold and from gold to octotimium.

You will need 30,000 monies to fully upgrade a tool and one ore of each (copper, gold, octotinium)

The boss is undefeatable without acid, so dont go fight him until you have access to the acid cave.

To get access to the Acid Cave where you can use your watering pot tool to fill it with acid, you need to destroy an old tree stump in the western forest, where the hedgehogs are (southeastern part of western forest).

To destroy the stump, you need an Octotinium Axe which, you guessed it, will also cost the same bunch of money and resources as the hammer.

Once you have your watering tool full of acid, you can go fight the Slime Lord.

After you damage him enough, he will begin to boil and bubble to regenerate, to stop him, quickly change your weapon to the watering tool with acid and pour some of it into the boss.

Repeat this until you kill it, achievement unlocked!

To trigger this even, you need to befriend Robert at least 1 star, maybe two.

Here is a chart for Robert to win his trust.

Robert ❤* F 1; Farmer,Bernadette's husband, white shirt, brown hair with forehead curl, jeans with belt
Loves: Octotinium, Salmon, King Salmon, Buttered garlic beans, Loquat
Likes: Tomato, Quartz, Hop, Kiwi jam, Greek salad
Neutral: Beet, Boot, Cabbage, Cauliflower, Chard, Corn, Cucumber, Egg(all), Emerald, Gold, Green Herb, Lettuce, Leek, Meat, Milk (L), Nightflower, Okra, Parsnip, Peanut, Potato, Radish, Rhubarb, Saltpetre, Turnip, Zucchini, pepper, Strawberry
Hates: Raspberry, Raspberry Jam, Raspberry Milkshake, Raspberry Juice, Boiled potato
Rewards: Husbandry +1, Beer recipe, Farming +1
source: https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1771680812

Then, on a Saturday, go to their Farm at around 17:30 and you will witness the scene and the achievement will unlock.

If you decide to talk to Robert, he will ask you for advice.

If you tell him to divorce, he will be available for romance.

Cheers!

Give the Vial to Kain for 10,000 monies and a Sin to get this achievement.

To get the vial, you need to have 2 friendship stars with Mei, Ken and Lazarus, then, on a Fall Night after the cooking contest day, go at night to Lazarus home then go out, Kain will drop the vial, after you get the vial, go to the Doctor so he can examine it.

From there, you can choose to give the vial to Kain and get this achievement.

If you give the vial to Lazarus, you get No more poison

You can choose to exit to main menu and restart the game to get the other achievement.

If you get to the end of the game without a Sin, you can unlock Annie's fine.

You need at least 2 sins to trigger That was me at the end of the game.

Cheers.

Give the tattered journal to Denny.

To get the journal, you need to find it in the depths of the Villa, read this guide for instructions: Oh no I'm in

Denny will ask you to meet him at the clearing south of the church yard (where the statue is) around midnight.

Denny will leave forever after Year 2, so this achievement and the ones after this, are time sensitive.

Then again, it takes a looooooooong time to get to the end of year 2, so you shouldnt worry too much.

The fight is not hard, just take a decent armor set and your blue tool weapon (you should have a blue axe since you got the Acid from the cave)

Once the cutscene is over, you got your achievo!

Congratz! You murderer, you!

*Note: Grab the blue stone as the next day starts, you will have dropped it nearby inside your house, looks like you cant eat that croissant while you had it, so you dropped it 😛

You can see the Denny fight plus other sinful acts in this video I made:

You need to show the indecent photos to someone other than the Mayor or Joshua, anyone would do, even the kids.. oh my!

Doing this action, will give you a Sin.

To get the photos, you need to complete all town's improvements then go to the mayor and he will ask you to help him with some boxes, he will leave and now you can go read a red book on the table.

Next, go to Joshua while he is in his office, he will give you his coat to deliver it to Martha, do so.

After learning about the code, sneak into Joshua's office when he is not in there, open the safe and get the photos.

If you show the photos to anyone other than the Mayor and Joshua you get Goodbye Mr. Mayor

If you return the photos to Joshua, you get I love blackmail

If you return the photos to the Mayor, you get I hate blackmail

You can choose to exit the game to the main menu to get the other achievements as it will start back up your day.

If you get to the end of the game without a Sin, you can unlock Annie's fine.

You need at least 2 sins to trigger That was me at the end of the game.

Cheers.

You will fight the dreamer after you fight with an enemy in the sealed cave, the dreamer fight happens regardless of how many sins you have.

To learn how to get the stone from Denny, read this guide A scammer darkly

Once you have the stone, you need to go to the sealed cave.

To unseal the cave, you need dynamite which is a 3 star recipe you get from Tobias.

Here is a small chart, showing what he likes to get him to trust you, I suggest you mine gold and give it to him, its easy.

Tobias Sp 30;Hermit, racoon-fur hat, lives in the rusty shack with the "get out" sign, is often confused
Loves: Gold, Octotinium, Diamond, Mead
Likes: Battery, Boar Hide, Copper, Fat, Iron, Saltpetre, Sulfur, Old Boot, Grilled meat, Bean soup
Neutral: Green Herb, Quartz, Black Herb, Croissant, Mushroom, Strawberry, Turnip, Okra, Tomato, Corn, Pepper, Raspberry
Hates: Collard, Honey, Flour, Damascene
Rewards: Bomb recipe, Hint about main event quest, Dynamite Recipe
source: https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1771680812

You can get a peanut to craft the dynamite as a rare drop from plant monsters you see deep in the mine or at the boar cave in the western forest.

Put the dynamite near the sealed cave and a cutscene will trigger, go inside and carry the stone above your head, head to the northeast walls and a door will appear.

Go into the door and after a short examination of a mysterious pool, a fight will commence! Win that fight and continue to the true boss, the dreamer!

Here is a video showing you the fight and the ending:

To win the contest you need a sophisticated dish, one with 4 or 5 ingredients should do.

Check this spreadsheet for a list of all possible recipes.

https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1845858940

Since the contest is held in early Fall, you will only have access to ingredients from Spring, Summer, the Shop and your animal products, maybe if you are quick enough, some quick growing tier zero fall crops.

I personally won it with spaghetti carbonara which needs cheese and butter as special ingredients but I already had some by this point.

Check this tab in the spreadsheet to learn which townsfolk gifts you the knowledge of how to make makers, which you need to make mayonnaise, cheese, butter and more.
https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1771680812

If you fail in the first year, there is always the 2nd year.

Cheers!

To get this achievement, you will need at least 2 sins and the blue stone you get from Denny then go to the sealed cave and find the hidden door.

To learn how to get the stone from Denny, read this guide A scammer darkly

Once you have the stone, you need to go to the sealed cave.

To unseal the cave, you need dynamite which is a 3 star recipe you get from Tobias.

Here is a small chart, showing what he likes to get him to trust you, I suggest you mine gold and give it to him, its easy.

Tobias Sp 30;Hermit, racoon-fur hat, lives in the rusty shack with the "get out" sign, is often confused
Loves: Gold, Octotinium, Diamond, Mead
Likes: Battery, Boar Hide, Copper, Fat, Iron, Saltpetre, Sulfur, Old Boot, Grilled meat, Bean soup
Neutral: Green Herb, Quartz, Black Herb, Croissant, Mushroom, Strawberry, Turnip, Okra, Tomato, Corn, Pepper, Raspberry
Hates: Collard, Honey, Flour, Damascene
Rewards: Bomb recipe, Hint about main event quest, Dynamite Recipe
source: https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1771680812

You can get a peanut to craft the dynamite as a rare drop from plant monsters you see deep in the mine or at the boar cave in the western forest.

Put the dynamite near the sealed cave and a cutscene will trigger, go inside and carry the stone above your head, head to the northeast walls and a door will appear.

Go into the door and if you were sinful enough, the text will say that you can see your own reflection, choose to fight it!

Its an easy fight, dont worry about it.

Once you defeat your reflection, this achievement should pop.

Cheers!

Here is a video of the fight:

You need to build all the makers in your workshop.
You need to befriend different people, at different levels for different makers.
Once they give you the blueprints, you need to craft them.

Brewing Keg Wood (16), Iron (8), Silver (6), Fat (2) *Get after befriending Alice
Cheese Maker Wood (18), Iron (16), Copper (12), Silicon (4), Quartz (2) *Get after befriending Penny
Chicken Feed Maker Iron (10), Copper (8), Wood (4), Fodder (4) *Get after befriending Regina
Mayo Maker Iron (22), Copper (10), Silver (6), Silicon (4) *Get after befriending Bernadette
Silk maker Wood (20), Iron (15), Copper (8), Quartz (4), Gold (2) *Get after befriending Martha
Yarn Maker Wood (18), Copper (16), Iron (10), Silicon (8) *Get after befriending Valentina

You need to befriend Alice, Penny, Regina, Bernadette, Martha and Valentina for the machines.
Check the spreadsheet on how to gain their trust: Townsfolk

Best place to find Iron is on Floor 1 of the mines, Floor 5 for Copper, Silicon and Quartz on Floor 12+

You can get Fat as an uncommon drop from boars and slimes.

Happy Mining!

Now for the hardest achievement, the one that needs its own section.

To pull this off, you will need to cook more than 100 recipes in your kitchen.
You can get a kitchen once you upgrade your house for the first time.

The problem here are the ingredients, some ingredients come only from tier 3 seeds which need you to sell 150 of tier 2 crops which need you to sell 100 of tier 1 crops which need you to sell 50 of normal crops. Yeah.. its gonna take time.

The exceptions to those are spinach and watermelon which you can only get by befriending Jun.

Thankfully, the T3 crops are only for Spring and Summer, so you dont have to worry about shipping so much in Fall or Winter, the first two seasons are the tough ones.

We have two tools to plan this, first the recipe spreadsheet https://steamcommunity.com/linkfilter/?url=https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1845858940

We also have the crop wiki (https://steamcommunity.com/linkfilter/?url=https://gleaner-heights.fandom.com/wiki/Crops) to check on how long it takes a crop to grow, and the name of the crops in each tier, etc.

So, here is the breakdown of the minimum of days each season to unlock all seeds:

It is pretty doable in the first year but you will be cutting it close, specially in summer, the first day you plant the seed does not count for this, so you need to start counting from Night 2 and if you want those pineapples, summer will be your challenge.

Upgrade your watercan to at least gold, the final days of a season is a good time to do this.
The gold watercan will let you water six squares in front of you in a 3x2 shape, the blue watercan lets you water 3x3 squares infront of you.

Getting the automaton will help, he can water up to 200 crops, give or take, he sweeps the field from far left to right and then from top to bottom. He ceases to water/harvest at 18:00.

Building the greenhouse is a good method of selling those crops you werent able to sell to their requirement limit before the next year season comes.

Getting max friendship from Gerry will give you a boost of 10% more watercan capacity.
This will make the blue watercan go from 54 cap to 59.

Here is a breakdown of the ingredients you will need to cook all known recipes, store +3 of every ingredient in case the recipe goes wrong or I miscounted.

There is a recipe that requires any 3 fruits.
Fruits are the ones you can blend, they must be different.

Need Grapes for Wine
Salmon, Mackerel and Trout only caught on a certain place & Season check the spreadsheet, Fishing tab.
The blue fishing pole gives you a better chance of catching those unique fish.

As you unlock a new crop, wait for a new day then cook a recipe with it and go down the list that way, you will always cook something new.

I wish you all luck and patience, cheers!

You can bring your blue bow to the contest on year 2, making it easier but not a joke, you still need luck and skill to hit all 20 targets.

They will provide the arrows at the contest.

Every time you reload the day to try again, the targets are randomized so there is no point in memorizing the sequence.

Good luck!

To get this achievement, you will need NO sins (remain innocent) and the blue stone you get from Denny then go to the sealed cave and find the hidden door.

To learn how to get the stone from Denny, read this guide A scammer darkly

Once you have the stone, you need to go to the sealed cave.

To unseal the cave, you need dynamite which is a 3 star recipe you get from Tobias.

Here is a small chart, showing what he likes to get him to trust you, I suggest you mine gold and give it to him, its easy.

Tobias Sp 30;Hermit, racoon-fur hat, lives in the rusty shack with the "get out" sign, is often confused
Loves: Gold, Octotinium, Diamond, Mead
Likes: Battery, Boar Hide, Copper, Fat, Iron, Saltpetre, Sulfur, Old Boot, Grilled meat, Bean soup
Neutral: Green Herb, Quartz, Black Herb, Croissant, Mushroom, Strawberry, Turnip, Okra, Tomato, Corn, Pepper, Raspberry
Hates: Collard, Honey, Flour, Damascene
Rewards: Bomb recipe, Hint about main event quest, Dynamite Recipe
source: https://docs.google.com/spreadsheets/d/1uFTcBK2cVYLOszrswMVP5J6xBdkTl3VkgOLaJnLBqME/edit#gid=1771680812

You can get a peanut to craft the dynamite as a rare drop from plant monsters you see deep in the mine or at the boar cave in the western forest, or as a T1 crop during Spring.

Put the dynamite near the sealed cave and a cutscene will trigger, go inside and carry the stone above your head, head to the northeast walls and a door will appear.

Go into the door and if you were sinful enough, the text will say that you can see your own reflection, choose to fight it!

Its an easy fight, dont worry about it, if you have good protection he wont be able to hurt you much.

Once you defeat the evil agent, this achievement should pop.