Sea Battle

Sea Battle was a port of the Intellivision game of the same name. The game never saw release during the 2600's heyday, but Intellivision Productions produced a limited number of professionally produced carts in 2000. These carts sold out quickly and due to copyright restrictions the ROM file has not released, making it still widely unavailable to most gamers. While it was a smash hit on the Intellivision, its success on the Atari 2600 would have been questionable. The Intellivision version made use of all the keys on the keypad, but since the Atari 2600 lacked a keypad, the game had to be simplified. Also simplified were the graphics since the 2600's display abilities were well below that of the Intellivision. The final nail in Sea Battle's coffin was the lack of a one player mode. A screenshot mockup exists which shows the player's bases on the left and right side of the screen instead of the top and bottom. It's unknown if any version of the game was developed which featured the side bases.