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