I like the domain and fitting in with online gaming, it may well be a winner, if you play your cards right and build it. You should be able to get a good pay day, gaming traffic can pay off very big that is for sure.
As to it's worth asis I'm not sure, you really need to do some research on it. As you know a domain is only worth what some one is willing, to pay you for it and what is build at it and the traffic it gets.
How much it makes and all that stuff, I would build it and use adsense and/or other while doing it, that way you make money as you build it and traffic. Looking at other sites close to the name, you should be able to do really good with it.