Addie Shen is a math based puzzle shooter. Play solo, team up in co-op, or practice your skills to stop the evil PEMDAS minions. Can you save the world with math? STORY MODE Jump between quadrants, dodge tricky tangents, and foil PEMDAS' calculated plans with the future of math. PRACTICE MODE Train your wits in fast paced, wave based exercises to help sharpen your math skills. MULTIPLAYER MODE Team up for split screen challenges . Whether cooperating or competing, it’s math-driven mayhem at its finest. FEATURES Procedural math equations for infinite playthroughs Story Mode with 5 narrative missions Practice Mode with addition, subtraction, multiplication, division, and more Multiplayer Mode with 4 competitive missions 1-2 player split-screen Lots of math puns Calculus?