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