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