Heavy instrumental soundtracks

Hi, I’m looking for instrumental soundtracks from videogames which sound like that of Painkiller, with constant heavy riffs. I don’t need melody because I plan on using these songs as the background for a mugen (fighting game). I don’t mind some epic touches, but not soft songs, and preferably not electronic elements.What other videogames have soundtracs like what I’m describing? I remember Spawn (Dremcast) has some heavy themes. Guilty Gear also has fantastic songs, but too recognizable for what I want. Thanx.

I’m doing some music for some friends video, but when I finish I could record something if you like. Go to my website and browse through the tracks in the player for demos.