One of the greatest "time-killer" games has to be solitaire. The ease of play mixed with the variety of styles just makes it a no-brainer for playing solo on the go. Concrete Software has just released an updated version of their original hit with Aces Solitaire Pack 2 that gives you 40 styles of solitaire right on your device. You can fire up Klondike and Free Cell, or step it up with Spider, Forty Thieves and more. The game includes online leaderboards, enhanced graphics and even stat tracking. With tons of play options and loads of variety, Aces Solitaire Pack 2 is a great choice for mobile gaming. You can pick it up now for $4.99 in the CrackBerry App Store.