Brain is Jelly — Bonk Your Head 30 Times
Last reviewed: · Sources & evidence status below
Quick answer: Brain is Jelly unlocks when you bonk your head 30 times. The official requirement text is exactly that; the practical method below is community-sourced.
How to do it fast
- Find any room with a low ceiling or a wall you can roll or jump into.
- Roll into it repeatedly — every head impact counts, anywhere in the game.
- 30 bonks later the achievement pops. It takes under two minutes.
There is no special location — community guides confirm any wall works, so there is no reason to postpone it. Bonk a few walls whenever you pass one during your first run and you will never think about it again.