It has a total of 13 numbers (0 – 12) and includes just some of the betting options in European roulette. Mini Roulette: This game is developed for smartphones and both its wheel & table are smaller than usual.Still, we list some of the most popular exotic games below so you can get an idea: There are also exotic variants of online roulette, but it is difficult to make a clear classification for them, as they offer features that can completely change the gameplay.