15 Hardest Bonus Levels In Video Games

Limbo – Secret Level

You can find this special bonus level in chapter 26 via a hidden path and it requires 10 hidden eggs to unlock. Of course, upon entering it, you’ll be shocked to realize that the entire level is pitch-black. The only way to progress is through sound because every obstacle in the level is present somewhere in the main game. So you’ll need to remember the obstacle, time your movement correctly and presumably not rage and smash your controller to smithereens upon failing.