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