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