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