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