Boxing 

Ringmasters pits you in direct man-to-man competition with others on-line. It is a fast-action boxing simulation where each opponent has unique abilities and advantages. 

In other words, now you can beat the stuffing outta someone in the chat room.

Ringmasters is easy to play, but not easy to master. Brains as well as brawn determine who will take and hold a title. You will have certain attributes (strength, agility, etc.) and "skill points" you can spend to enhance them. How you develop them is completely in your control. Increasing your strength, for example, can let you devastate someone with a blow; but neglecting your agility may leave you a slow, clumsy target. Moving up a weight division (by moving up in score) will gain you more skill points to further increase your attributes. Thus a middleweight would probably knock the socks off a flyweight. On the other hand, if a smart flyweight is able to beat out a higher-level fighter, he'll grow in rank and gain skills points a lot faster.

You can also watch the action from ringside, where you can cheer/jeer and even effect rivals in the ring. The blow-by-blow detail can help you discover powerful combinations and winning moves you can use as you fight from Street fighter to Heavyweight champion of the on-line world!
Be sure to READ the rules, there's a lot of tips in there!