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.
Complete at least 100 missions.
Kill 100 enemies using fire damage during the same mission.
Extract with at least 15 common samples.
Heal another player using stims.
Be injured in all limbs at the same time.
Extract at least 15 rare samples from a mission as a team.
Play at least 50 missions.
Kill 5,000 enemies.
Kill a bug warrior with a shotgun within 1 meter.
Play a planet defense mission.
Throw back a live grenade.
Defeat a Hulk.
Defeat a Bile Titan
Extract with a full team on a Hard difficulty or more mission.
Complete 10 tactical objectives.
Kill 150 enemies during the same mission.
Kill 25 enemies with one stratagem.
Fly at least 25 meters from the shockwave of an explosion.
Customize your Helldiver with new cape, armor, and helmet.
Complete a Stalker Hive tactical objective.
Kill a target at a distance of over 100m.
Extract after the timer reaches zero.
Play 1 Bot Mission.
Complete a mission but fail to extract.
Play 1 Bug Mission.
Extract from a mission during nighttime.
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.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Reach max level on one ship module.
Upgrade all ship modules at least 1 level.
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.
Provide assisted reload for a teammate.