25 CFR 502.8: Electronic or electromechanical facsimile.

Electronic or electromechanical facsimile means a game played in an electronic or electromechanical format that replicates a game of chance by incorporating all of the characteristics of the game, except when, for bingo, lotto, and other games similar to bingo, the electronic or electromechanical format broadens participation by allowing multiple players to play with or against each other rather than with or against a machine.