- Street Fighter Alpha Anthology

The Alpha Anthology, is so far the best port of any Street Fighter collection. It includes five games (SF Alpha, Alpha 2, Alpha 2 Gold, Alpha 3, and Gem Fighter), as well as two unlockable games (Hyper SF Alpha and a "bonus" version of SF Alpha 3).
The graphics and music of the five titles are perfect, just like the original arcade games themselves. If you have a wide-aspect ratio TV, you'll be treated to full arcade goodness - if not, you can modify the aspect ratio so that it fits a standard TV. Controls are also flawless, much like those of the Anniversary Collection.
The unlockable games are as follows:
"bonus" SF Alpha 3: It's SF Alpha 3 with more fighting styles, and all (most?) the Street Fighter characters, drawn Alpha-style. This includes characters that have never before made it into Alpha games - like Balrog and Fei Long, and some that are brand new. When played alone, this game is very difficult.
Hyper SF Alpha: Very similar to SF Alpha 3 (in fact, I'm not sure what the exact differences are, in terms of gameplay), but can only be played against another opponent. Includes the same characters as "bonus" SFA3.
In addition, all Alpha games include a Versus mode with full win/loss tallying, a Dramatic Battle mode - in which two players (Human/Human or Human/CPU) simultaneously take on a single CPU player and a Survival mode, which places you against opponent after opponent, refilling only a portion of your life bar after each match.
To sum it up, the Alpha Anthology is the best SF collection Capcom has released. Here's to hoping that the Darkstalkers and Marvel series will follow a similar suit.