Teleport your worms to the start. Rope (the direction doesn't matter) around the map as long and fast as you can and count the number of laps finished. A lap is finished if you passed the Start line.
The first who has 20 laps wins. The game ends when everyone played the same amount of turns.
If you plop your worm the current round doesn't count. If you plop all your worms, you lost.
Do not block or knock the opponent!
If the one who started (player A) gets up to 20 laps in a turn and the opponent (player B) can make it up to 20 laps in the following turn the game is a draw.
If a draw happens, replay the game: then the winner is the first one who accomplished 15 laps. If a draw happens again, then it's sudden death: keep playing until someone gets slower than the other, finishing with player B.
(Description based on: Random00's Wascar tournament that took place in 2008.)