Here is the full list of all 21 RICO achievements.
Get a kill with a side arm, tactical weapon, and a grenade in the same room
Knock off 50 masks
Revive yourself five times
Complete a two-player operation
Finish three operations losing less than ten health
Complete a case
Neutralise three or more criminals with one stinger in the same room
Get one thousand kills
Get five hundred kills
Get twenty melee kills
Get one hundred kills
Clear a room while in slow-mo ten times
Complete a daily operation
Knock down a criminal sliding into a room
Complete a daily training session
Revive another player five times
Survive five waves in lockdown mode
Survive ten waves in lockdown mode
Reach level 14
Complete a case on Hard difficulty
Purchase all the weapons