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