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.
Kill a bug warrior with a shotgun within 1 meter.
Upgrade all ship modules at least 1 level.
Shoot off both arms on a Hulk and then extract while it's alive.
Defeat a Bile Titan
Extract at least 15 rare samples from a mission as a team.
Play at least 50 missions.
Kill 5,000 enemies.
Throw back a live grenade.
Extract with a full team on a Hard difficulty or more mission.
Defeat a Hulk.
Fly at least 25 meters from the shockwave of an explosion.
Kill 25 enemies with one stratagem.
Complete 10 tactical objectives.
Customize your Helldiver with new cape, armor, and helmet.
Extract after the timer reaches zero.
Kill a target at a distance of over 100m.
Play 1 Bot Mission.
Heal another player using stims.
Extract from a mission during nighttime.
Complete a mission but fail to extract.
Complete a Stalker Hive tactical objective.
Kill 150 enemies during the same mission.
Play 1 Bug Mission.
Play a planet defense mission.
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.
Be injured in all limbs at the same time.
Reach max level on one ship module.
While using a jump pack, knock yourself into a ragdoll state.
Provide assisted reload for a teammate.
Extract with at least 15 common samples.