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