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.
Play at least 50 missions.
Extract at least 15 rare samples from a mission as a team.
Kill 100 enemies using fire damage during the same mission.
Complete a full Extreme difficulty Blitz mission and extract in under 6 minutes.
Provide assisted reload for a teammate.
Kill a Charger with a resupply pod.
Kill 5,000 enemies.
Complete a mission but fail to extract.
Play a planet defense mission.
Customize your Helldiver with new cape, armor, and helmet.
Extract with a full team on a Hard difficulty or more mission.
Kill 25 enemies with one stratagem.
Defeat a Bile Titan
Kill a bug warrior with a shotgun within 1 meter.
Complete 10 tactical objectives.
Kill a target at a distance of over 100m.
Extract after the timer reaches zero.
Complete a Stalker Hive tactical objective.
Play 1 Bot Mission.
Defeat a Hulk.
Fly at least 25 meters from the shockwave of an explosion.
Extract from a mission during nighttime.
Kill 150 enemies during the same mission.
Play 1 Bug Mission.
Complete Basic Training.
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.
Complete at least 100 missions.
Have 6 orbital barrage stratagems in the same place at the same time.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Be injured in all limbs at the same time.
Reach max level on one ship module.
Upgrade all ship modules at least 1 level.
Shoot off both arms on a Hulk and then extract while it's alive.
Throw back a live grenade.
While using a jump pack, knock yourself into a ragdoll state.
Heal another player using stims.
Extract with at least 15 common samples.