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