WMS likes to name their games based on the gamestyle. G+ games are basically free spin bonus games on a 5x3 reel configuration. All G+ games to the best of my knowledge are stand-alone. There's not way to "know" if a game is stand alone or not, unless you know by experience. I typically just google the game, if it has extra stuff on it (like a big progressive board on top), then it's probably not stand alone. Some games have a WAP and a Stand-alone version, you just have to ask here which program to look for. A lot of the E-bay auctions with the "rare" themes are the WAP types that are not useful for the home folks.