KJMANN originally proposed Laserblast X as part of a multi-game cartridge with a set of Activision 2600 games that never made it over to the 8-bit. I started the graphics, and some test programming for these things around same time I started Venture. I do not remember if Venture was to be included. However, we were advised by several parties, it be better to sell these games individually because every time a company like Activision made one, it sold poorly. Majority of the consumers prefer individual games, because these multicart things usually have 1 or 2 games out the set that was worth anything.
What I do instead with games like Laser Blast X, Surround Em, Putt 18 is have a larger set of game options where you can turn features on and off or change the style of play. Laser Blast X already was 4 different styles: 3 tanks, 4 tanks, tanks + fighters, 6 tanks. Along with an option for the enemies to shoot lasers or bullets up at you. I was working on several ideals that never made it to the final game. Like having an extra large rocket shoot up when going to the next set of tanks, or something fly in from above and drop a bomb for you to dodge. Ran into issues with trying to make all that happen and was adding more complexity to debug and figure out how to make it work. I do not remember if I was coming up a against fitting inside the size of the ROM also, but I always got around it by optimizing other parts of the program or compress more sections of the game.
Other 2600 games that were pitched were Chopper Command, Enduro, Sky Jinx, Barn Storming, etc. But I am doing something similar to Chopper Command / Chop Lifter. What happened after I figured out how to use Deflate/Inflate with Venture, I asked myself can I do this with some other game, maybe a few other games. Have them deflate stuff from the 16K ROM cartridge without using the more expensive bank switching set ups. These are like 20k+ games compressed onto a 16K cartridge.