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.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Complete at least 100 missions.
Extract at least 15 rare samples from a mission as a team.
Extract with at least 15 common samples.
Throw back a live grenade.
Extract with a full team on a Hard difficulty or more mission.
Defeat a Bile Titan
Complete a mission but fail to extract.
Be injured in all limbs at the same time.
Play at least 50 missions.
Provide assisted reload for a teammate.
Kill 5,000 enemies.
Extract after the timer reaches zero.
Defeat a Hulk.
Complete 10 tactical objectives.
Kill 25 enemies with one stratagem.
Complete a Stalker Hive tactical objective.
Play a planet defense mission.
Kill a target at a distance of over 100m.
Fly at least 25 meters from the shockwave of an explosion.
Customize your Helldiver with new cape, armor, and helmet.
Kill 150 enemies during the same mission.
Kill a bug warrior with a shotgun within 1 meter.
Heal another player using stims.
Play 1 Bot Mission.
Play 1 Bug Mission.
Extract from a mission during nighttime.
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.
Kill a Charger with a resupply pod.
Have 6 orbital barrage stratagems in the same place at the same time.
Kill 100 enemies using fire damage during the same mission.
Upgrade all ship modules at least 1 level.
Shoot off both arms on a Hulk and then extract while it's alive.
While using a jump pack, knock yourself into a ragdoll state.