Series where with each new game you can't play the older games?
Excluding sports games. Are there just games with each new entry the previous entries become difficult for you to go back to?
I feel this way about Smash Bros. Each new game has a new roster. new trophies with the exception of Brawl(game sucks) better gameplay and visuals. Not to mention online communities move to the new game and even for those who liked to Brawl the online service is gone. The only reason is to pop in Melee is to see that great menu and hear that great menu music.
After Saints Row III the first 2 games just became unplayable.
Same with Sonic Racing Transformed. First game just can't back to except the way to unlock things I liked better.