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