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