Garry's Mod

On Steam, right-click Garry's Mod and go to Properties > Set Launch Options and set the following:

-noborder -windowed -novid -nosound -nojoy -noipx -nopreload -nod3d9ex -low -textmode -insecure +sv_lan 1 +map gm_flatgrass +achievement_debug 1

You can now idle the game using the least resources possible with a console text view that will show you your progress. The game must be idled for one year for "Addict".

For this achievement you need to use a special map (My map (gm_flatgrass (kinda edited)) 😃 ) with over 1000 props to delete with remover tool. All you need to do is spam left mouse button. After you deleted every prop in this map just reload it.

P.S. You can use console command "achievement_debug 1" to know how much props you need to destroy (progress appears in console after you delete 1 prop)

Link to map: https://steamcommunity.com/sharedfiles/filedetails/?id=2529146609

For this achievement just either join a multiplayer server (any) or create a singleplayer server. Then press team chat button , by default "U" and type "bloxwich", then press enter. The achievement should pop up.

1. Navigate to <path-to-game>
2. Create a .bat file
3. Paste in the following code:

@ECHO OFF

for /L %%i IN (1, 1, 1000) DO (
	start "" "hl2.exe" -noborder -windowed -novid -nosound -nojoy -noipx -nopreload -nod3d9ex -low -textmode -insecure +sv_lan 1 +map gm_flatgrass +achievement_debug 1
	echo Started %%i times
	timeout /t 7 /nobreak
	taskkill /f /im "hl2.exe"
)

pause

4. Save
5. Double click the batch file to run it

This will open and close the game in it's minimal, low power state 1,000 times. It will remain open for 7 seconds, which should be enough time for it to increment the "Achievement count increased for GMA_X_STARTUPS: x/1000" counter, as well as tell you how many times it has opened the game.

This will take ~2 hours to complete if you've never launched the game before.