I already wrote in the "Atari 2600 Homebrew" FB group... and I also write it here, right now.
It's almost 30 years I hope that someone will come out with the idea of making a 2600 porting of the arcade coin-op version of "Pitfall II - The Lost Caverns" (Sega, 1985).
Since I cannot hack a game nor programming one from scratch, I made (but it's since 10 years...) some mockups of the game, a full-map, closely related to Crane's original, artworks (one of them it's the boxart), and many, many other things...
I already played on the SG-1000/ColecoVision version (emulated): it is a good attempt to re-create the arcade game but...
HEH !!! ... I really can't play on it because it has almost no elements of the gameplay of the Sega coin-operated game !
Believe me, since I think I know almost every aspect, even the "hidden" ones, of this game ! And it's since the 1985, when I used to play it in a local arcade, in which I owned the top-score (my best is around 2 million points... not so far from the World Record, and, of course, I got several 1.9 million point games recorded, and officially confirmed, with WolfMame).
[CLIP = best score on Retrogaming History Arcade Competition 2013. Not my best but enough... ]
And here it is the "Underground map" of the arcade game.
I made it by editing and putting together hundreds of Mame screenshots... [PIC]
Just to show you how "big" is the arcade game...
Now, the full-map development of Crane's Pitfall II is 29 horizontal levels/platforms x 8 "columns" , for a total of 232 "locations".
The arcade game's "lost caverns" underground section develops for 28 platforms x 8 "columns", and it also has a first section which is 2 levels x 32 screens, but apart from this last the two games' developments are pretty "near" !
Then, if someone would want to "hack" the original Pitfall II he can surely maintain the development of the game area !
He should give up only one of the levels of the ''underground section"(I have already made a" full map "and, knowing the game, I realized what platform can easily removed) and as many as 24 horizontal screens of the "first section", but it is a sacrifice that I believe can be done !
[ PIC(left) = original map of Pitfall II for the C=64. It differs from the VCS' version only for graphic details... ALL the rest is the same ! ]
[ PIC(right) = VCS' "Pitfall II - Arcade" mockup map, taken from the original map and filled/completed with almost all the elements of the arcade version ]
... what do you think'bout it ?