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