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