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