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