Zero/Sum

About

Zero/Sum is a puzzle game where you solve math problems to advance a chaotic story about a professor’s murder and a cancer cure. Each level requires placing plus and minus signs into equations to reach target numbers. The gameplay is straightforward but tricky, balancing logic with timing as you race against countdowns. Between puzzles you watch short live-action scenes that parody action movies, complete with absurd dialogue and over-the-top performances. The story treats you to a ridiculous plot where every twist feels intentionally overcooked. The biggest hook is the blend of dry puzzles and intentionally campy storytelling. Community reviews often mention the cutscenes’ hilarious commitment to nonsense, with some calling them a highlight. While the math challenges can feel repetitive after a while, the game’s self-aware humor and tight 3-4 hour runtime make it a quirky pick. It’s not deep but it’s polished, with a vibe that feels like a cult movie you can play.

Storyline

"On the eve of discovering a mathematical cure for cancer, your mentor, Professor Claire Liddy, is murdered. Fortunately, before she died, the Professor was able to erase many of the plus and minus signs with her bloody hands, saving the cure from falling into the hands of her killers. Now it is up to you to fill back in the missing parts of the equation and resolve your professor's cure. It's up to you to cure cancer -- AGAIN! (It's a comedy)."