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