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