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