Woodle Tree Adventures

If you do the 3000 berries exploit right off the bat (guide for that here: https://youtu.be/5RKKArhlQVQ), you can go straight to completing the Mountain level (600 berry requirement), which then unlocks the Hive of Bees level, which upon completion unlocks the Summer Beach level, which upon completion of THAT unlocks the Winter is Coming level. After finishing the Winter is Coming level this achievement pops. You do not need to bother with the Hills level nor the bonus level at all.

There's an exploit that lets you gain about 100 berries per 10 seconds.

To set up the exploit, complete the first level while collecting a good amount of berries. Then go back to the first level, and press the "BackPad360" button at any time after the white loading screen. This will instantly complete the first level again. Whatever amount of berries you collected on your first run will be added to your total amount of berries. Repeat this process until you have 3000 berries.

The "BackPad360" button is not bound to any keyboard key by default. If you have a controller, just press the Select button (also known as the Back button or the View button on Xbox controllers).

If you close the game, you will have to set up the exploit again. Beware that pressing Start and Select at the same time will instantly close the game.

This exploit only works with the first level.

All credit goes to this Steam Community guide by Birdd: https://steamcommunity.com/sharedfiles/filedetails/?id=294189708