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 a full Extreme difficulty Blitz mission and extract in under 6 minutes.
Play a planet defense mission.
Shoot off both arms on a Hulk and then extract while it's alive.
Have 6 orbital barrage stratagems in the same place at the same time.
Complete at least 100 missions.
Reach max level on one ship module.
Be injured in all limbs at the same time.
Upgrade all ship modules at least 1 level.
Kill 100 enemies using fire damage during the same mission.
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.
Defeat a Hulk.
Throw back a live grenade.
Play at least 50 missions.
While using a jump pack, knock yourself into a ragdoll state.
Extract at least 15 rare samples from a mission as a team.
Kill 25 enemies with one stratagem.
Kill 5,000 enemies.
Defeat a Bile Titan
Kill a bug warrior with a shotgun within 1 meter.
Extract with a full team on a Hard difficulty or more mission.
Kill a Charger with a resupply pod.
Complete 10 tactical objectives.
Complete a mission but fail to extract.
Heal another player using stims.
Extract with at least 15 common samples.
Play 1 Bot Mission.
Kill a target at a distance of over 100m.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Kill 150 enemies during the same mission.
Provide assisted reload for a teammate.
Extract after the timer reaches zero.
Complete a Stalker Hive tactical objective.
Extract from a mission during nighttime.
Fly at least 25 meters from the shockwave of an explosion.
Play 1 Bug Mission.
Customize your Helldiver with new cape, armor, and helmet.
Complete Basic Training.