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