So there's this guy on youtube that adds lyrics to video game music, but lately he's expressed great interest in composing music for video games. On youtube he goes by Brental Floss, RL name Brent Black. He's got a hell of an impressive resume, over 68 million views on youtube, 225k subscribers.
Check out his resume and samples of music he's composed, he does a little bit of everything. http://brentblacktunes.com/
Also check out his youtube channel. http://www.youtube.com/user/brentalfloss?feature=watch