Here is the full list of all 13 CRSED: F.O.A.D. achievements.
Kill 3 players with grenades in one battle
Get at least one hit with each of listed weapon type in one battle: rifle, assault rifle, submachine, semiauto, shotgun
Kill 4 enemies at the same time. All kills should be within 10 seconds time from first to last one
Do 4 headshot kills in one game
Play 100 hours in battles
Loot at least one of each Regular, Premium, Tactical and Royale fridges in one battle. You have to take out all the items from the fridge for it to count
Kill 3 enemies at the same time. All kills should be within 10 seconds time from first to last one
Win 3 games in a row
Win a battle without killing anyone
Win your first battle
Kill 7 players in one battle
Loot your first gun
Get your first kill