Here is the full list of all 88 FatalZone achievements.
Defeat 300,000 enemies
Gather 10,000 resources in total with the Tank class
Hold out for ten minutes in a raid while playing as a Tank
Reach lvl. 15 in a raid with the Biotech class
Defeat 1,000 enemies with the Tank class
Hold out for five minutes in a raid while playing as a Pyro
Reach lvl. 30 in a raid with the Pyro class
Defeat 1,000 enemies with the Pyro class
Hold out for ten minutes in a raid while playing as a Pyro
Defeat 100,000 enemies
Complete a raid with the Scavenger class
Hold out for ten minutes in a raid while playing as a Scavenger
Use the Airstrike item 15 times
Reach lvl. 20 in a raid with the Brawler class
Defeat 1,000 enemies with the Scavenger class
Defeat 8,000 enemies with the Brawler class
Complete a raid with the Biotech class
Hold out for five minutes in a raid while playing as a Brawler
Reach lvl. 20 in a raid with the Biotech class
Defeat 1,700 enemies with the Biotech class
Hold out for 10 minutes in a raid while playing as a Biotech
Defeat 160 enemies with the Brawler class
Use the Airstrike item five times
Reach lvl. 25 in a raid with the Veteran class
Defeat 40,000 enemies
Take 5,000 damage in total with any class
Reach lvl. 60 in a raid with any class
Gather 18,000 resources in total with any class
Use the Large Shock Grenade item five times
Hold out for twelve minutes in a raid while playing as a Survivor
Collect 8,000 coins in total
Hold out for 29 minutes in a raid while playing as a Survivor
Reach lvl. 40 in a raid with any class
Destroy 77 crates
Defeat 17,000 enemies
Defeat 5,000 enemies
Defeat 10,000 enemies
Take 2,000 damage in total with any class
Hold out for two minutes in a raid while playing as a Veteran
Collect 1,000 coins in total
Defeat 1,500 enemies
Destroy 20 crates
Reach lvl. 10 in a raid with any class
Hold out for seven minutes in a raid while playing as a Survivor
Use the Super Magnet item once
Kill your first enemy
Defeat 33 enemies
Hold out for one minute in a raid with any class
Defeat 750 enemies
Take 1 damage with any class
Complete a level at the Forest location while playing as a Scavenger with the Legend mutator
Complete a level at the Forest location while playing as a Saboteur with the Legend mutator