Infection is a game for two to four players, any or all of which can be the computer. Each player plays for himself, so there's no teaming up. At least, you can deliberately team up against someone, I suppose, but the match doesn't end until only one player is left, so sooner or later you'll have to play to win. The game is played on a seven by seven grid, and the object of the game is to turn all of the opponents pieces to your colour. If you have a black and white TV or you're colourblind, then you can have each piece show a number to show which player controls it. There are only three rules to the game: 1) Each player takes turns to make a move. If you cannot make a move, then you miss a turn, but if you have one or more moves open to you then you must make one move (and one only). 2) During your turn you move one of your pieces. Pieces can be moved in one of two ways, either to an adjacent square, in which case the original piece duplicates itself, with the new piece moving to the designated square, or you can move two squares away, in which case the original piece does not duplicate itself, it instead moves to the designated square. 3) When a piece moves onto a square, it turns all adjacent pieces to it's own colour. If, in doing so, it effectively removes an entire colour from the board, then the player who controls the lost colour is out of the game. When all of the pieces on the board are the same colour, then the game is over, and the player who controls the remaining colour is the winner.