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