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