Download size

How many GB is Zero Sum?

1 GB

That is less than the typical Indie game, which needs about 3 GB.

Leave at least 7 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

A hand-drawn twin-stick roguelite where every bullet is an equation and every enemy is a number. Subtract, divide, root, modulo. 7 operators, 22 firing modes, 9 bosses, 80+ upgrades. Reduce them all to zero. No health bars, just raw arithmetic violence. You failed math class. Math didn't forget.