Gambling is a content descriptor used in PEGI 12, 16, and 18. It signals that there are themes which may encourage or teach gambling in the game. This is not used on every casino-themed video game, however, and many casino games may be rated at PEGI's lenient 3 or 7 categories. This makes the descriptor the least commonly used out of the 7 major descriptors used by PEGI, as Online is an optional feature.