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