Information URL: http://www.planetquake.com/teamreaction/q3pong/about.shtml

Two teams face off in a giant arena reminiscient of a Pinball table. Each
team has a goal(s). A gigantic (bigger than your player) ball is dropped
into the middle. Each team tries to roll the ball into the other team's
goal. However, the ball is extremely massive.

You can only move it using your weapons (super shotgun or railgun
recommended). You can also push the ball, but it will only roll slowly.
Should you happen to lie in the path of a quickly-moving ball, you can kiss
your ass goodbye. Yes that's right, balls will crush other players who are
not quick enough to get out of the way. In fact, one of the main ways to
kill people in QPong is by blasting a ball into them (resulting in instant
gibbage).

Anyway, back to the goals. Each time you roll a ball into your opponent's
goal, you score on them. Each team starts with a certain number of points
(10 is the default). Each time you score on a team, you lower their score by
1. Once a team reaches zero, they are eliminated.

The balls make use of an almost totally realistic physics system - they roll
and bounce according to the laws of friction and motion. Send two balls into
each other and momentum is transfered. Balls roll down hills at an
increasing rate.