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