5-10 on average Each different online casino has a different number of games on offer. Some sites have 150+ games, some sites have 250+ games, and some even have 300+ games. Regardless, most of these games are going to be online slots. Then, blackjack tables are the next most common offering. After blackjack, online roulette games are featured. The reason why there are comparatively few roulette sims is simply that the game doesn’t lend itself to entertaining themes the way slots do, and there aren’t as many versions of the amusement like there are with blackjack.