King of Fighters XIII is finally coming to Steam on September 13th, and if you're a part of the beta, you can now enjoy your extended testing period until September 6th. A change of plans has occurred access wise, and now anyone who pre-orders the game can access the beta -- nice! If you want a chance at a key without buying the game, check out the King of Fighters Facebook page over the course of the next few days.
It took me a while to come around to it, but King of Fighters XIII is a massive step up from the disappointing XII, and I really enjoy it to this day. If you haven't played it yet and enjoy good fighting games, consider at least picking it up on a Steam sale.