5200 and Atari 8-bit version has extra level that can be reached when you finish the mail part. There are many details about the extra caves so would it be possible to build something like Pitfall 2 part 2 ROM based on the extra level? Only the original graphic and basic code would need to be transferred, the layout would need to be changed, new monsters, and clue information would need to be added.
Can it be done? I don't know enough about 2600 code to do this since it'd be more complicated than a straight level layout hack.
Can it be done? I don't know enough about 2600 code to do this since it'd be more complicated than a straight level layout hack.