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.
Extract at least 15 rare samples from a mission as a team.
Throw back a live grenade.
Upgrade all ship modules at least 1 level.
Defeat a Bile Titan
Provide assisted reload for a teammate.
Play at least 50 missions.
Be injured in all limbs at the same time.
Kill 5,000 enemies.
Play 1 Bot Mission.
Defeat a Hulk.
Complete a mission but fail to extract.
Extract with at least 15 common samples.
Complete 10 tactical objectives.
Play a planet defense mission.
Extract with a full team on a Hard difficulty or more mission.
Extract after the timer reaches zero.
Complete a Stalker Hive tactical objective.
Kill 25 enemies with one stratagem.
Heal another player using stims.
Customize your Helldiver with new cape, armor, and helmet.
Kill 150 enemies during the same mission.
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.
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.
Kill a Charger with a resupply pod.
Have 6 orbital barrage stratagems in the same place at the same time.
Kill 100 enemies using fire damage during the same mission.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Reach max level on one ship module.
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.