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