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