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