Taking place on a chess-like 9x9 board, the Light Side & Dark Side battle for victory. Each side can be set to human-controlled, computer-controlled, or "cyborg" where a human controls the side but can let the computer fight the battles.
Each side has an Archon which can cast a set of spells, though each spell can only be used once per game. Teleporting a unit from a permanently-light square to a permanently-dark square (or vice-versa for the Light Side) is a good opening stratagem.
Battles occur in an abstract arena with columns, some of which shift in and out of existence. Pictured here, one of the Dark Side's two Basilisks finishes off the Light Side's Phoenix. The lowly goblins and knights rely on melee attacks, and the Banshees and Phoenix rely on close-range area attacks, but the other units all have ranged attacks.
Of the 81 squares, 25 are permanently light, 25 are permanently dark, and 31 gradually shift from one to the other and back again. The color of a square affects the health of units fighting on it.
Victory can be achieved by occupying all 5 "power points", by completely annihilating the opposition, or by reducing the opposition to one unit inflicted with the 'imprison' spell.