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