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