Advice for how best to connect with developers at video game companies?

An ideal use case of the app @jplaces and I have built (https://spare.gives) is if video games used our APIs to route some in-game payments as donations to poor recipients (e.g. you pay $2 in Farmville to make your crops grow faster and the $2 goes directly to the phone of a Kenyan farmer living on less than $2/day).

We're are hoping to connect with developers at video game companies (large or small) who could give us feedback on the idea and help us make inroads with CSR departments at these gaming companies. Any advice for the best places to find the right developers? Thanks!