Full list of all 20 Tentacles: Enter the Mind achievements worth 200 gamerscore.
Achievements they've won
Achievements they've not won
Fly through the hole of any knife.
Complete the Libido Layer.
Kill 10 Kamikazes without killing any other creatures.
Pick up 3 tombstones without dying.
Use a revive token.
Crack your first egg.
Go from one pitstop to the next without killing any enemies.
Hold on to three rubber duckies at once.
Have a Kamikaze orbit Lemmy
Get 5 snipers to aim at you simultaneously.
Attach all three tentacles to the oscillator screen on the science box
Use all 3 powers.
Equip the rainbow trail and the pink eye.
Kill 5 enemies with 1 bomb.
Crack a purple egg.
Crack a black egg.
Kill a Rammstein without using any powers.
Complete the entire Regret Layer.
Reach a multiplier of 8.
Reach a multiplier of 10.