Here is the full list of all 57 Kill to Collect achievements.
Complete the campaign with Ivan Ironfist on Hard difficulty.
Complete the campaign with Riot Ray on Hard difficulty.
Complete the campaign with Shocking Shelly on Hard difficulty.
Complete the campaign with Kate Katana on Hard difficulty.
Complete the campaign as Shocking Shelly.
Deploy 4 turrets in a fight
Have your turret kill a Bounty Target.
Complete the campaign as Riot Ray.
Kill three enemies in one bull rush.
Complete the campaign as Ivan Ironfist.
Complete a Repeatable Challenge
Kill a Defender with the Handcannon
Have an Artillerist die by his own grenades.
Watch yourself being placed first on a leaderboard.
Complete a "One Try" Challenge.
Kill 3 enemies with one use of Ironfists ultimate ability.
Complete the campaign as Kate Katana.
Complete all chapters of the campaign in any way you like.
Kill a Vanguard with a whip
Kill an enemy in a factory shredder.
Blow 3 enemies up with a Grenade.
Kill a friend with the Rocketlauncher
Gib one of every enemy in the game.
Kill 4 or more with one rocket using the Rocket Launcher.
Revive a friend with less than 1sec left on the timer.
Kill 8 enemies with one Lazer Cutter.
Set fire to 3 enemies with one Incendiary Grenade.
Strangle someone to death with the LazerWhip
Complete a (not challenge, not tutorial) bounty in 350s or less.
Complete a floor ( not tutorial ) in 90s or less.
Hookshot 15 enemies.
Kill an enemy with the last bounce of the laser disc.
Kill 15 enemies with a Flamethrower.
Complete a floor using just x -attack (Dodge is still allowed)
Kill 3 enemies with one Proximity Mine.
Clear every challenge room in a bounty without dying.
Beat a Challenge Room without taking any damage.
Land 50 consecutive attacks in a row without taking damage.
Hit 5 or more enemies at once with Kate Katanas Crackdown.
Land 20 consecutive attacks in a row without taking damage.