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