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