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