Killer Instinct will launch on the Xbox One as a free-to-play downloadable digital game tonight. Quite a few gamers that were deemed worthy enough actually received the Season One characters for free for being a loyal customer. What those qualifications were, who knows? But it is pretty awesome that Microsoft did give this out for free to some lucky gamers. If you weren’t fortunate enough to make the list, you will have to buy the additional characters. Pricing, depending on what you want to do, ranges from $19.99 to $59.99. You will be able to see these options when you download Killer Instinct for free tonight (or tomorrow).