Both are Java-based, which means you need a relatively new browser to play. Here's a free online game in which you can win cash prizes by playing bingo. Here's a roundup of free educational, fun games for children from Microsoft. If so, this site is hard to beat. Microsoft's gaming center is the biggest resource of its type on the Web, with over 2 million registered users.
Membership is free.
The Zone supports up to 16,000 online players simultaneously at peak times. Free games here include backgammon, bridge, checkers, chess, cribbage, go, hearts, Mind Aerobics, reversi, spades and Bingo Blitz. This feature makes it easier to locate opponents to compete against. Among MSN Gaming Zone's more helpful new features is its free ranking system, which shows you how you stack up versus the competition. In Acrophobia, you must come up with witty phrases to match acronyms, while competing and chatting with players across the Web.