Alien Attack is a bonus slot with a wild symbol. There are three modes of play: Regular, Bonus and Free Spins. During regular play the objective is to obtain a winning combination of symbols on any of the 32 paylines. You can select any number of paylines and you can bet from 1 to 5 coins on each line. During bonus play you've got the chance to multiply your coins played many times over. When you see an Alien Attack winning bonus combination on the reels, a bonus game will automatically open. When you see a winning Free Spin combination on the reels, a Free Spin game will automatically start. During Free Spin play you can multiply your win amounts up to x5. A casino slot with 5 reels and 32 paylines is used. In Alien Attack the player can choose the value of the credits being played. For each payline selected, the player can bet from 1 to 5 credits for a maximum bet of 160 credits. Payouts for winning combinations depend on how many credits were bet on the winning line.