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