Here is the full list of all 25 Swarmhunters achievements.
Finish a game
Win a game on Easy difficulty
Win a game on Normal difficulty
Win a game on Hard difficulty
Defeat the Charger with Fortress
Defeat the Blaster with Fortress
Defeat the Dominator with Fortress
Defeat the Emperor with Fortress
Defeat the Charger with Tempest
Defeat the Blaster with Tempest
Defeat the Dominator with Tempest
Defeat the Emperor with Tempest
Defeat the Charger with Volcano
Defeat the Blaster with Volcano
Defeat the Dominator with Volcano
Defeat the Emperor with Volcano
Defeat the Charger with Phantom
Defeat the Blaster with Phantom
Defeat the Dominator with Phantom
Defeat the Emperor with Phantom
Defeat 20000 enemies
Defeat 2000 mutated enemies
Reach Level 100
Take more than 500 damage in a single run
Acquire all achievement