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 with at least 15 common samples.
Kill 100 enemies using fire damage during the same mission.
Play at least 50 missions.
Complete an Extreme difficulty mission or higher without anyone dying.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Defeat a Hulk.
Kill 5,000 enemies.
Complete 10 tactical objectives.
Extract at least 15 rare samples from a mission as a team.
Defeat a Bile Titan
Complete a Stalker Hive tactical objective.
Fly at least 25 meters from the shockwave of an explosion.
Kill a bug warrior with a shotgun within 1 meter.
Play 1 Bot Mission.
Play a planet defense mission.
Kill 25 enemies with one stratagem.
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.
Complete a mission but fail to extract.
Extract after the timer reaches zero.
Heal another player using stims.
Play 1 Bug Mission.
Extract from a mission during nighttime.
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.
Extract with a full team on a Hard difficulty or more mission.
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.
Be injured in all limbs at the same time.
Reach max level on one ship module.
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.
While using a jump pack, knock yourself into a ragdoll state.
Provide assisted reload for a teammate.