Here is the full list of all 25 Death Squared achievements.
Find 10 secret items
Find 5 secret items
Find a secret item
Finish the Party
Complete 10 Party levels
Viewed the credits. Thanks!
Finish the Story
Complete 60 Story levels
Complete 40 Story levels
Die 999 times
Die 250 Times
Complete 20 Story levels
Complete 9 levels in a row without dying
Complete 6 levels in a row without dying
Complete 3 levels in a row without dying
Skip the intro
Die 50 times in a single level
Die A Lot More
Complete 10 Story levels
Make All 4 players dance at same time
Make All 4 players die at same time
Complete a Party level
Die 10 times
Customize your bot
Complete 1 Story level