Video Slots have been gradually replacing the old reel slot machines in the casinos for some time now. The dirty little secret is that even today's reel slot machines aren't really mechanically driven, but run off computers with random number generators in the same way that the video slot machines do. Video Slot machines remove any of the old mechanical pieces of their earlier ancestors, and have entirely replaced them with a computer screen. The cool thing about video slots is that removing the mechanical reels also removes some of the constraints placed on the game by them. In video slots, the player can play more than the typical 1 or 3 lines of a reeled slot machine. Many games allow the player to play up to 9 or 10 different lines that zig zag across the screen. Video slots also can introduce mini games that would not be available in an older mechanical machine.