Liontamer, of VGFrequency, wisened me to this kind of video game tribute album all put together on the NeoGAF forums by their members. 26 songs spanning a wide range of genre and influence. An amazing album from relative unknowns in the VGIM world. I for one hope this becomes a regular contribution from the folks at NeoGAF, and is an impressive effort. The album is titled G.A.M.E. and is available free in RAR format from this NeoGAF thread.
You can also help them out by digging their album.