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