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