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