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