"Omen" from Xenogears by Yasunori Mitsuda
http://www.youtube.com/watch?v=qzhWuriX9Ws

The Street Fighter III: 3rd Strike had a bunch of gems, but these are my favorites:

"The Circuit (Hugo Stage)"
http://www.youtube.com/watch?v=FZ5qQA5BSHY&feature=plcp&context=C3ac1d1fUDOEgsToPDskIl68TfIpirHIm4XIFfUav-

"The Beep (Remy Stage)"
http://www.youtube.com/watch?v=R1G6a4b2ouc

"Killing Moon (Akuma's Stage)"
http://www.youtube.com/watch?v=u-ySWoIZKvA&feature=plcp&context=C37be721UDOEgsToPDskIR6fmWwWJN2KoBuww-nBM1

"Crowded Street (Yun and Yang's Stage)"
http://www.youtube.com/watch?v=FNPWFMMNrKM&feature=plcp&context=C304f1a1UDOEgsToPDskLJxZ03WZ2YuiyD0Q97Hasc


"One Winged Angel" from FFVII by Nobuo Uematsu
http://www.youtube.com/watch?v=t7wJ8pE2qKU

"Ice Cap Zone: Act 1" from Sonic the Hedgehog 3
http://www.youtube.com/watch?v=CNUgwyd2iIA

"Carnival Zone: Act 1" from Sonic the Hedgehog 3
http://www.youtube.com/watch?v=gHwHiymSojk