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