Chain Reaction by Ephileo

Chain Reaction is the classic game of orbs, critical mass, and cascading explosions. The rules take ten seconds to learn. Tap a cell to place an orb. When a cell holds more orbs than it can bear, it bursts into its neighbors, and every orb it touches turns your color. Those neighbors can burst too. One well-placed tap can sweep the entire board. The strategy takes much longer to master. A corner cell holds two orbs before it goes. An edge holds three. A cell in the middle holds four. Every orb you add is both an attack and a liability, and a board that looks settled can turn over completely on a single move. Play head-to-head, hunt for the one move that topples everything, and learn to think an explosion ahead.