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