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