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