Here is the full list of all 14 LET IT DIE achievements.
Completed "Destroy the 4 FORCEMEN" quest.
Capture 100 Fighters
Die 100 times
Defeat all Jackals
Collect everything (Magazines, Mother Barb Songs, Stamps)
100 successful home defenses
Defeat Taro Gunkanyama
Defeat Mr. Crowley
Eat 1000 mushrooms
500 equipped weapons/armor broken
Achieve 100% home destruction on other players' bases 100 times
Defeat Colonel Jackson
Defeat 100 Haters
Defeat Max Sharp