1 - No way to install the game without STEAM (end stop).
2 - Even if you get a DVD (that was write with files of an older version of the game ~ early 2011) when install, STEAM delete the files and download a updated version with last official patch (December, 2013).
3 - Thus is not need media (physical or digital) to install the game, just a key code (what you already have) to install the game through the STEAM (modern school).
3 - The game is actually enjoyable if install Team Fusion patch's - over the last official -
TF 3.0, 3.01 - 4.0 - 4.30 - 4.312.
Sokol1