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