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