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