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