Timeball

Timeball is the furthest possible evolution of baseball played in the distant future by post-humans cranked out on a steroid called Yum Yum Fracas (possible side affects include spontaneous life tripling & disloyal gums). The ball is pitched at near light speed, and upon impact with the bat breaks through the time barrier and into the past, far into the past if you've got a good hitter.

There are no set rules for scoring in timeball. Rather, the ball changes the course of history in its entire (sometimes through the butterfly affect, sometimes by hitting famous galaxy leaders in the head and thoroughly killing them), and the goal is to change ths history to one where your team currently has the higher score.

It is standard for the team roster, language, religion, and occasionally body shapes to change drastically throughout the course of a game.

The game is over when a player stops Timeball from ever having been invented.