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