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