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