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 at least 15 rare samples from a mission as a team.
Upgrade all ship modules at least 1 level.
Extract with at least 15 common samples.
Complete a Stalker Hive tactical objective.
Extract with a full team on a Hard difficulty or more mission.
Defeat a Bile Titan
Play at least 50 missions.
Kill 5,000 enemies.
Complete 10 tactical objectives.
Throw back a live grenade.
Play a planet defense mission.
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.
Kill 150 enemies during the same mission.
Kill a bug warrior with a shotgun within 1 meter.
Complete a mission but fail to extract.
Defeat a Hulk.
Extract after the timer reaches zero.
Play 1 Bot Mission.
Complete Basic Training.
Customize your Helldiver with new cape, armor, and helmet.
Extract from a mission during nighttime.
Kill a target at a distance of over 100m.
Heal another player using stims.
Play 1 Bug Mission.
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.
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.
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.