Battle Royal is a version of Gin Rummy designed for three simultaneously active players.
In Battle Royal, each player is dealt ten cards. Each player in turn, beginning with the player to the left of the dealer, has the option of taking the initial upcard. Thereafter, each player in turn may take either of his opponents discards, unless one has already been taken.
When a player knocks, the other players may lay off only on the knocker's original sets, and not on subsequent cards. For example, if the knocker's set was 4-5-6, and the next player laid off a 7, the other player may not add an 8.
Individual scores are kept for each player. The winner of each hand scores the difference between his count and the sum of his opponents counts. There is no undercut bonus. If the knocker is undercut, 20 points are deducted from his score. The bonus for going gin is 40 points. A hand ends in a draw if no one has knocked and only three cards remain in the stock.
The game is played to 200 points, then bonus points are added as in two-handed Gin Rummy. Each player settles separately with the others, according to their scores.