Here is the full list of all 39 HELLDIVERS achievements.
Kill 100,000 enemies.
Fully upgrade all non DLC Weapons and Stratagems.
Defeat an Illuminate Great Eye.
Achieve the rank of Grand Lord (Rank 25).
Take part in a successful defense of a capital city by completing at least one mission.
Use the Reinforce Stratagem while downed and the last Helldiver alive on a difficulty 8 or higher mission with 4 players.
Defeat a Cyborg Siegemech.
In a 4 player game, on a Friday, have all players sitting in an APC or HAV at the same time.
Complete a difficulty 7 or higher mission without triggering any alarms.
Defeat a Bug Hive Lord.
Kill a Bug Tank with a Resupply Stratagem Hellpod.
Complete a difficulty 10 or higher mission without a single death.
While in melee range from a Cyborg Warlord, use the "NO" communication command.
Kill an Illuminate Obelisk while it is closed.
Complete a difficulty 4 or higher mission in 5 minutes or less.
Complete a mission using only Stratagems.
Complete all missions on a planet with difficulty 10 or higher.
Complete at least one planet in a successful Galactic Campaign.
Kill a Bug or Illuminate assassination target by running it over with the APC or HAV.
Complete a mission with over 300 shots fired and 80% accuracy or better.
Kill 10,000 enemies.
Complete a difficulty 7 or higher mission against the Cyborgs without taking damage from any enemy.
Kill a Bug Tank, Bug Behemoth, or Cyborg IFV by having the extraction shuttle land on it.
Extract from a difficulty 8 or higher mission with 4 players where all 4 get on the shuttle.
Do 25 capespins in a row, without moving, while on the ship bridge.
Complete a volcanic type planet of difficulty 5 or more.
Achieve the rank of Captain (Rank 13).
Destroy a Bug Nest, Cyborg AA, or Illuminate Beacon with anything but the NUX-223 Hellbomb.
Successfully complete an escort objective where all 4 NPCs survive.
Face each new enemy once.
Join another game through the matchmaking system.
Play at least once against all enemy races.
Kill 7 enemies within a very short time using only your primary weapon.
Achieve the rank of Sergeant (Rank 7).
Play at least once on a desert, a forest, and a snow planet.
Take part in a successful final assault on an enemy's home planet by completing at least one mission.
Complete a mission.
Customize your character.
Finish the Training.