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