This sounds as a deja vu to me. I have been in a similar situation back in 2000, we could only solve the issue thanks to a good mediator. However every situation is different and hence your route to a solution might be different. It also depends where you are in the world that defines how an emai...
Why not try Freelancer.com or Elance, one of those type of sites. Surely you can find someone skilled, with past experince easily viewable, looking for something a little more "ongoing". Best of luck with it!
The quick and honest answer is - you don't. In games, as in many places in the software industry, ideas are worth nothing, only the implementation counts. In addition, ideas tend to evolve during development and the design you end up implementing in the final game is quite often very different f...
Before litigating on one another, why don't you instruct your respective legal counsel not to sue, but rather to MEDIATE and come up with a FAIR solution for both parties based on: hard dollars invested, sweat equity and ideas. And before you even spend your after-tax dollars as an entrepreneur t...