Double Decker is a free online slot machine game that comes with a lot of features which make it a darling to play. The first thing is the fact that it has 9 lines of play. This means that you have more chances of winning than a game that only has 5 lines. The number of bets that you make per line will also determine how much you win. You can bet anywhere from a single dollar per line to 10 dollars per line. The great thing about this game is the wild and bonus symbols placed in it. The wild symbol, which is the flag of Britain, will substitute for any symbol and will double the pay that you get from the win. So if you have two symbols in a line and they have the Wild symbol in between, it will be counted as a win and you will get double the pay. The Double Decker bonus is triggered when you have three bonus symbols in any line; this will increase your pay by over $10,000. You should study the winnings table so that you can know how the symbols win, depending on how many they are and also the lines. Whenever you win, the game will highlight the lines that have won, and also the winning symbols. This is a great game for those who do not understand how slot machine games are won. Some people play without even understanding the game, and they just spin the reels and wait for some coins to fall out of the machine, or they wait for the jackpot bell to ring. However knowing how the symbols win, and the lines, will make you play the game from an informed point of view. This is a great slot game, and quite entertaining, given the theme of the symbols.