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