I use Renoise software and high quality VST's (=virtual instruments) to create songs. I have access and over 10 years of experience from electric guitars too.
I've got probably hundreds (maybe (definately) an overestimate) of shorter "pattern loops" and can also make special effects.
I've been interested in making game specific music for many years now, so please don't hesitate to contact me if you've got some projects going on!
Please contact me if you would like to use this in a project. We can discuss the details.