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