Hearts is a really fun card game that involves four players and is also known as Black Lady, Chase the Lady, Crubs, and Black Maria. Magmic makes a great Hearts game for BlackBerry that is entirely free and has been recently updated with a fresh UI and slick new graphics. The game is pretty simple, just avoid cards with hearts as well as the Queen of Spades. The player with the fewest points wins.
Grab your free copy of Hearts for BlackBerry, free from App World. The updated version of Hearts only applies to selected devices (82XX and up, excluding the 87XX).