Here is the full list of all 24 Cute Things Dying Violently achievements.
Beat the game.
Get your first Critter into the Elevator.
Reach 30 lifetime level restarts.
Dunk your first Critter in oil, and have fun doing it!
Find two different ways to set off the Oil Drum in Despair Mail.
Save a Critter that has been char-broiled red.
Kill Critters by all available methods: falling, spikes, buzzsaws, explosions, fire, and electricity.
Get 100 lifetime Critter kills.
Get 250 lifetime Critter kills.
Get 500 lifetime Critter kills.
Have every Critter (at least two) in the level die within a one second timespan.
Get a perfect score on every level in Stage 1.
Get blood on every solid object in a level.
Save all Critters in Gone With The Wind in 45 seconds.
Get a perfect score on Split Second.
Get 40 fires going simultaneously.
Beat the Zapper Hate Bot.
Beat the Timebomb Hate Bot.
Beat the Buzzsaw Hate Bot.
Beat the Drill Hate Bot.
Beat the Flamethrower Hate Bot.
Get a perfect score on every level in the game.
Beat Hang Time without the Critter leaving the screen.
Save more than three Critters in Six Enter - Three Leave.