As a huge fan of post-hardcore as a genre, I immediately think of pulses. and their song "KUPO!" for heavy crossovers with gaming specifically. I think The Callous Daoboys are my current favorite band and they do a ton of stuff with electronic elements in their music, but other than stuff like playing Wii Sports music in the middle of some of their sets they haven't done much with gaming at all yet, but I definitely hope they do someday!