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