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