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