I've really been enjoying the music from Wangan Midnight Maximum Tune soundtracks and I was wondering if anybody could recommend more game soundtracks that are remotely similiar? It doesn't have to be racing games but I'd imagine that is where most of the techno soundtracks come from.

These come to mind. May or may not match the intensity of WMMT, but at least electronic-sounding enough to be worth a mention:

Other Yuzo Koshiro works (e.g. Bare Knuckle 1 to 3, Namco X Capcom theme songs)
Various Initial D songs
Einhander (or Kenichiro Fukui tracks in general e.g. Front Mission 5: Scars of the War)
Gradius V
Granado Espada (non-guitar/violin songs)
Beatmania IIDX series and artists (wide variety)
Akira Yamaoka: iFUTURELIST
Chaos Legion
Lumines

Some of those are pretty far from Wangan Midnight Maximum Tune. Look into Neo Contra and Ridge Racer soundtracks if you haven't already.

There is also some good stuff in Gran Turismo 5. Check out radiotire:
http://www.youtube.com/watch?v=Fz6j46V4MaM

Ok cool I got some titles to check out. Anybody else got any suggestions?

The music from these games is a mix of techno and trance. Here are some similar tracks/soundtracks that come to mind:

"M.Bison Stage" from Street Fighter Tribute Album
Motorhead (PSX)

What about the Shutokou Battle series?

Hey guys I did manage to find something pretty similar. The game is called Racing Battle C1 Grand Prix. The soundtrack is very trancey like Maximum Tune's music.

Seems like racing games are the only types that use this techno/trance music? I'll keep looking.

You might like this soundtrack as well:

http://www.youtube.com/watch?v=wYBYt_WPbwg

It's not always energetic, but it gives me the same vibes.

Hey that is a nice find.. exactly the sound I was looking for. Thanks for that one

Not familiar with Wangan music in the slightest, but if you liked that specific track, here are the variations.

http://www.youtube.com/watch?v=cnGIjyNHLLM
http://www.youtube.com/watch?v=wQIxyJ8X4Pc

I much prefer this version, since it transformed one good yet ordinary track to one of my absolute favorite shooting pieces of music (the OST is also one of the strongest in recent years). Btw, thanks to the link above, I happened to find a great fan-piano arrangement. He basically took a similar approach to Umemoto, yet more touching.

EDIT: I think his was based on Uememoto's version.