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