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