Here is the full list of all 38 HELLDIVERS 2 achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Reach max level on one ship module.
Complete an Extreme difficulty mission or higher without anyone dying.
Shoot off both arms on a Hulk and then extract while it's alive.
Play a planet defense mission.
While using a jump pack, knock yourself into a ragdoll state.
Have 6 orbital barrage stratagems in the same place at the same time.
Be injured in all limbs at the same time.
Complete at least 100 missions.
Complete a full Extreme difficulty Blitz mission and extract in under 6 minutes.
Kill a Charger with a resupply pod.
Extract at least 15 rare samples from a mission as a team.
Kill 100 enemies using fire damage during the same mission.
Throw back a live grenade.
Upgrade all ship modules at least 1 level.
Complete a full Hard difficulty mission or higher without anyone firing their primary or support weapon.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Kill a bug warrior with a shotgun within 1 meter.
Provide assisted reload for a teammate.
Play at least 50 missions.
Kill 5,000 enemies.
Extract with at least 15 common samples.
Defeat a Hulk.
Play 1 Bot Mission.
Kill 25 enemies with one stratagem.
Extract after the timer reaches zero.
Complete 10 tactical objectives.
Defeat a Bile Titan
Complete a Stalker Hive tactical objective.
Extract with a full team on a Hard difficulty or more mission.
Complete a mission but fail to extract.
Kill a target at a distance of over 100m.
Fly at least 25 meters from the shockwave of an explosion.
Heal another player using stims.
Kill 150 enemies during the same mission.
Play 1 Bug Mission.
Extract from a mission during nighttime.
Customize your Helldiver with new cape, armor, and helmet.
Complete Basic Training.