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