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