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