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