From Cold and Logical:
Tien Len is a four player card game where each player is dealt thirteen cards. The player with the 3 of Spades begins the game by placing a hand containing the lowest card. Players then continue in a clockwise order, beating the current high hand. Tien Len is greatly based on suit (Spades < Clubs < Diamonds < Hearts) and rank (3 < 4 < 5 ... < A < 2). Hands vary from single cards, to pairs, to straights and so forth. Tien Len is more commonly known in America as Thirteen.
Features - Realistic computer opponents - 3 Levels of artificial intelligence - Animated game play - Various customizable settings
*Note: The rule set used is derived from play that I have encountered the most. If you use a different rule set, it is because i have not encountered it.
Future Plans - Multiplayer Play - Advanced Customization - More Intelligent Artificial Opponents