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