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