Traditional casino and gambling games (e.g. slots, bingo, poker etc.)
Games primarily about playing bingo with others.
Example games: Bingo Blitz, Bingo!, Bingo Blingo
Casino games primarily focusing on poker, blackjack or other casino card games.
World Series of Poker - WSOP
Example games: World Series of Poker - WSOP Poker, Zynga Poker
Casino games with focus on slot machines
Example games: Slotomania, Big Fish Casino, Scatter Slots