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.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Upgrade all ship modules at least 1 level.
Defeat a Bile Titan
Complete a mission but fail to extract.
Extract after the timer reaches zero.
Complete a Stalker Hive tactical objective.
Be injured in all limbs at the same time.
Kill 5,000 enemies.
Play at least 50 missions.
Extract with a full team on a Hard difficulty or more mission.
Extract with at least 15 common samples.
Defeat a Hulk.
Complete 10 tactical objectives.
Throw back a live grenade.
Provide assisted reload for a teammate.
Heal another player using stims.
Kill a bug warrior with a shotgun within 1 meter.
Fly at least 25 meters from the shockwave of an explosion.
Kill a target at a distance of over 100m.
Customize your Helldiver with new cape, armor, and helmet.
Play 1 Bug Mission.
Extract from a mission during nighttime.
Play 1 Bot Mission.
Play a planet defense mission.
Kill 150 enemies during the same 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.
Extract at least 15 rare samples from a mission as a team.
Have 6 orbital barrage stratagems in the same place at the same time.
Kill 100 enemies using fire damage during the same mission.
Kill 25 enemies with one stratagem.
Reach max level on one ship module.
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.