This is very old card game, originally called "War". In this Cards Battle you can play vs AI or vs your friend via in-game HotSeat mode. You can read rules of the game, in game help, or over the internet. Rules: In the basic game there are two players and you use a standard 52 card pack. Cards rank as usual from high to low: A K Q J T 9 8 7 6 5 4 3 2.