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