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