Here is the full list of all 24 Grounded Sim achievements.
The Good Ending
The Bad Ending
The Key Pad Ending
Get Killed by Kayloo
Get Killed By Mr.Crawler
The Funky Ending
Get Killed By The Kaizo Killer
Get Killed By Drooloo
Get Killed By Doober
Get Pelted By a Tomato
Get Kayloo'd
Get Killed By Oven at the Very End of the Battle
Get Killed by Oven or Teeth
"Defeat" Oven
Get killed by Giga Kayloo
The True Ending
Survive One Night at Kayloo's
Kill Drooloobot
Spare Drooloobot
Meet Usagi
Get The Hateful Ending
Pick Up The Cowboy Hat
Get Killed By Mr. Stitches
Get Killed By The Jack o' Lantern