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