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