So I've been wanting my RT to fall to chaos since the first character i ever made. if i buy BC simply to add rules to RT will it work out for me?

Cornwallis said:

Not really, you'd be better off buying the Radical's Handbook from Dark Heresy.

I'd recommend picking up Black Crusade for the updated ruleset to 40k rpgs, but also for the conversion option in it that "resets" your corruption and insanity track once you pledge yourself to the dark gods. It gives you a bit more freedom to mess around with the corruption/insanity inducing stuff that you would normally play with while being the villain or the anti-hero.

Cheddah said:

Are there particular rules that I should consider importing directly? Or, are you aware of a thread that highlights the best changes? I've got the books, but not the foresight to check for cleaner or more elegant solutions.