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