I'd probably give it up for The Orange Box for having a little more variety, largely because of Team Fortress 2, which has a lot of big distinctions between itself, and almost every other shooter ever made.
If the Orange Box didn't have TF2, I'd actually say Mario All-Stars. The question did say, for it's time, and at the time there were no downloadable services for old NES game or backwards compatibility in the SNES. Having a compilation of three of the most classic NES games on one cartridge for the newest system at the time was huge. In addition to the graphical improvements, and a much demanded save system, Mario All-Stars also introduced The Lost Levels (Jap. SMB2) to the US. An ultimate challenge to die-hard Mario fans.







