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