Gamey 8-bit songs?

You might wanna try this.


Or if you literally meant 8-bit, there are plenty Megaman and Castlevania songs you might enjoy.

My taste is like these, Sicks:
https://soundcloud.com/monstercat/nitro-fun-final-boss
https://soundcloud.com/dubstep/boss-wave-by-xilent

I just dunno what genre these fit in lol, sry for the trouble xD

Dubstep and electronica?
You might want to give Payday soundtrack a try.