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