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