Here is the full list of all 23 Mayhem Triple achievements.
Decapitate The Dire Bunny.
Kill a bunny in midair while diving and holding 2 weapons.
Walk Outside!
Just beat it!
Cause 20 enemies to be destroyed by testicle bombs.
Discover the secret to defeating the bunny threat and save the world.
Destroy the helicopter in a special way.
Find the hidden greasegun in the "Prologue" chapter.
Find the hidden magnums in the "House of Cards" chapter.
Find the hidden Face-Trapper in the "Adobe Acrobat" chapter.
Kill 5,359.4 enemies.
Buy every available health upgrade and weapon holster.
Save a hostage.
Save every hostage in the game.
Kill 10 enemies with a single sawblade.
Stake 30 bunnies to a wall.
Score a perfect 10 in death.
Permanently kill the birthed alpha bunny.
Unlock every tontine treasure.
Get Georgia Close's number. You creep.
Find a better way to kill a mech.
Taze a crotch rocket.
Finish the game without health upgrades.