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