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