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