This is a two-player game played on a hex grid. The playing pieces have shields facing certain directions, which both protect them against attack from that direction and lets them move any distance in that direction. At the end of a move, a piece can be rotated to a new facing. The goal of the game is to checkmate your opponent's Helios piece, which is a weak piece with no shields and only able to move one step at a time.

Omnigon is a very tactical game - often, a lone piece can go on a mating attack if there is a gap around the opponent's Helios. Games are short and furious - rarely lasting even twenty moves.