Thanks to GameSpy for its column discussing some of the choicest 2D side-scrolling games of all time, as discussed in a lecture at the recent Game Developer's Conference in San Jose. Some of the "ten games from the past that have something to teach the aspiring platform game designer" listed included "Batman (1989, NES): Best wall jump ever (and game over music, he noted)", as well as "Ghouls 'n Ghosts (1988, AC/Gen/etc.): 'If your game is harder than this, you're in trouble.'", and even "Super Mario All-Stars (1993, SNES): Everything you need to know in one cart." What are your favorite 2D side-scrolling platformers of all time?