 Infogrames, which has published a CD-ROM edition of "Monopoly", also includes the selection of "house rules" as a possible variant of play.Electronic Arts, which publishes current electronic versions of the game, such as for the Nintendo Wii, also includes the selection of certain house rules.Unofficial versions of the game, which share some of the same playing features, but also incorporate changes so as not to infringe on copyrights, have been created by firms such as Late for the Sky Production Company and Help on Board.