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 100 enemies using fire damage during the same mission.
Play at least 50 missions.
Reach max level on one ship module.
Kill 5,000 enemies.
Be injured in all limbs at the same time.
Extract with at least 15 common samples.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Complete an Extreme difficulty mission or higher without anyone dying.
Throw back a live grenade.
Kill 25 enemies with one stratagem.
Provide assisted reload for a teammate.
Play 1 Bot Mission.
Defeat a Hulk.
Extract at least 15 rare samples from a mission as a team.
While using a jump pack, knock yourself into a ragdoll state.
Defeat a Bile Titan
Complete 10 tactical objectives.
Kill 150 enemies during the same mission.
Complete a Stalker Hive tactical objective.
Extract with a full team on a Hard difficulty or more mission.
Extract after the timer reaches zero.
Fly at least 25 meters from the shockwave of an explosion.
Complete a mission but fail to extract.
Heal another player using stims.
Kill a target at a distance of over 100m.
Customize your Helldiver with new cape, armor, and helmet.
Extract from a mission during nighttime.
Play 1 Bug Mission.
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.
Complete at least 100 missions.
Have 6 orbital barrage stratagems in the same place at the same time.
Upgrade all ship modules at least 1 level.
Shoot off both arms on a Hulk and then extract while it's alive.
Play a planet defense mission.
Kill a bug warrior with a shotgun within 1 meter.
Complete Basic Training.