Here is the full list of all 15 RIPD: The Game achievements.
Fully Upgrade One Weapon
Win Every Bet
Soul Kill 100 Deados
Win Your First Bet
Complete Every Challenge In One Level
Kill 65 Deados
Complete Your First Challenge
Arrest 10 Deado Criminals
Execute 10 Deado Criminals
Beatdown 50 Deados Using Melee
Send Hayes to Judgement
Use Salary to Purchase All Weapons
Fully Upgrade All Weapons
Complete All Maps on the Hardest Difficulty
Unlock the Final Showdown with Hayes