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Here is the Origins Achievement/ Trophy List
Little lost girl - In Origins, release Samantha.
Not a gold digger - In Origins, share a weapon you dug up.
All your base - In Origins, activate all generators without allowing one to stop.
Kung fu grip- In Origins, free yourself and another from the Panzer Soldat's Claw in one game.
Playing with power - In Origins, build all elemental staffs in one game.
I'm on a tank! - In Origins, ride the tank around the map without getting off.
Saving the day... all day - In Origins, revive another player four different ways in one game.
Master of Disguise - In Origins, use Zombie Blood to revive three players and activate a generator in one game.
Overachiever - In Origins, complete all 4 Challenges in one game.
Master Wizard - In Origins, wield all of the ultimate staffs in one game.
What Are Your Theory's ?
Will be thinking myself today and update as we go