Short answers, pulled from the story.
Street Fighter Collection contains three games: Super Street Fighter II: The New Challengers (1993), Super Street Fighter II Turbo (1994), and Street Fighter Alpha 2 Gold, an enhanced version of Street Fighter Alpha 2 exclusive to this compilation. The two Super Street Fighter II titles are on one disc, and Alpha 2 Gold is on a separate disc.
Street Fighter Collection was developed and published by Capcom for the Sega Saturn and PlayStation in 1997.
Street Fighter Alpha 2 Gold is based on Street Fighter Zero 2 Alpha, an enhanced arcade version of Street Fighter Alpha 2 released in Japan, Asia, and South America. It adds Evil Ryu to both console versions, introduces Cammy as a hidden character in her Alpha series debut, and includes Champion Edition-style renditions of all Street Fighter II characters featured in the game.
Cammy appears in Street Fighter Alpha 2 Gold as a hidden character playable in Versus and Training modes, marking her debut in the Alpha series. Her portrayal is drawn from her role in X-Men vs. Street Fighter, depicting her as a Shadaloo agent working for M. Bison before she joined Delta Red.
Critics praised the arcade-accurate ports but generally concluded the game selection was too weak to justify a purchase. Reviewers at GameSpot and Sega Saturn Magazine criticized Capcom for including Super Street Fighter II, widely seen as one of the weaker series entries, and argued Alpha 2 Gold was too similar to the original Alpha 2, which most fans already owned.
Street Fighter Collection won Fighting Game of the Year and Best Compilation at Electronic Gaming Monthly's 1997 Editors' Choice Awards. It also finished as a runner-up for Saturn Game of the Year, losing to Saturn Bomberman.