Phffffpt!(posted 9678 days ago)I'll make it even simpler.
Pick one version of each game to be the official version. Discount the others. Vote on it if there is a controversy.
Why should Puckman and Pacman count as two games? They are almost identical. I don't want to play 3 dig dugs which are all the same, because it is redundant!
In the case of sf2 it's a bit harder to decide, but you could allow ONE original sf2, ONE sf2 champion edition and ONE sf2 Hyper Fighting.
This is the way I do it for Twin Galaxies. I don't think it's fair for someone to get 3 bites at the apple just because there are 3 clones, and another person only gets one. Dividing the points among the clones sounds really convoluted.
Remember the reason there was 3 Joust ROM revisions was because the game let you scab points big time. Easy solution: Always use the newest ROM revision!
My 3 cents