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