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