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