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