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