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.
Upgrade all ship modules at least 1 level.
Kill a Charger with a resupply pod.
Complete at least 100 missions.
Reach max level on one ship module.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Kill 100 enemies using fire damage during the same mission.
Play at least 50 missions.
Shoot off both arms on a Hulk and then extract while it's alive.
Be injured in all limbs at the same time.
Kill 5,000 enemies.
Defeat a Bile Titan
Extract at least 15 rare samples from a mission as a team.
Extract with a full team on a Hard difficulty or more mission.
Kill 25 enemies with one stratagem.
Kill a bug warrior with a shotgun within 1 meter.
Extract with at least 15 common samples.
Defeat a Hulk.
Kill a target at a distance of over 100m.
Complete 10 tactical objectives.
Complete a Stalker Hive tactical objective.
Fly at least 25 meters from the shockwave of an explosion.
Throw back a live grenade.
Kill 150 enemies during the same mission.
Heal another player using stims.
Customize your Helldiver with new cape, armor, and helmet.
Extract from a mission during nighttime.
Play 1 Bot Mission.
Complete a mission but fail to extract.
Play a planet defense mission.
Extract after the timer reaches zero.
Play 1 Bug Mission.
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 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.
While using a jump pack, knock yourself into a ragdoll state.