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