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