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