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