There are three main types of online slot machines but each and every type cannot just be classified in one bracket as there are so many different styles and types within each main classification. There are three reel slots which have single paylines or more than one payline up to five in total. These games offer many different bonus opportunities in some cases and in other cases there are no bonus options at all. The games can include wild symbols and scatters, nudges and holds, shifts and free spins and off screen bonus games such as a bonus trail where the player works his way around a board picking up different bonuses and prizes as he goes along. The five reel video slots offer even more options, including all of the above together with free spins, scatter wins, pick and win bonus features, expanding wilds, cascading reels and even gamble options at the end of every win. Amongst both the three reel online slots and the five reel online slots there are also progressive games which are played in the same way with the addition of a progressive jackpot that can be won at random or at when achieving a certain configuration of symbols. The progressive jackpots grow with every player that places a real money bet.