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