3D Christmas Slots - Version 1.1 Christmas slots is part of a series of seasonal / holiday slot games published by Ultisoft, Inc. Halloween Slots is also available and others will be released soon. This is a three payline slot machine game. Up to three coins can be bet on each spin. Winnings are based on the symbols on the payline. A payline is only active if there is a coin bet on it. There are also several bonus features which make Christmas Slots very fun and also adds an element of skill to the game. The game will detect the number of colors available and will use either True Color (24-bit) graphics or 256 color (8-bit) graphics depending on your graphics card's capabilities. The game will also adjust to your current resolution and will take up the full screen.