The main objective of Side Pocket is to sink balls in each level and reach the predetermined scores to progress. However, you'll have only several "lives" and every error can be fatal. After each stage is completed, a bonus stage will appear, as well as the chance to earn extra balls. You'll need a good aim in the parquet block.
The game has different versions with various features. In the original Side Pocket version for Game Boy, you'll compete against the timer trying to get all balls in pockets and earn points. The later NES release introduces modes for 2 players with two variants: 2P Pocket Game and 2P 9-Ball Game. The premise is to sink 9 balls before the other player makes them first.
Game Boy version is a completely redrawn game featuring 1 or 2 players' actions with two game modes: 9-ball and Pocket. The Pocket mode is generally similar to NES version, where you need to reach a predetermined number of points by sinking consecutive shots and balls in numerical order.
Side Pocket for other platforms like Genesis and SNES features improved graphics and sound. The Pocket game mode includes more stages and trick shot layouts, allowing you to travel to different cities in the U.S.A. and claim championship there. New modes are Trick game and Jukebox.
Side Pocket for Wonder Swan is a unique version with one and two-player play on a single device. In single-player mode, you'll choose an avatar from a menu and need to beat the remaining opponents. The player and CPU take turns in hitting the ball.