Right, so, it's a game... Details?

Agreed. I'm quite hesitant to authorize access (even to my public details) without a bit more info.

Side note: Github's UI for authorizing access is very clear and concise. Way to go Github!

Looks like you can see random examples: http://coderwall.com/roll-the-dice

And an example with a lot of achievements: http://coderwall.com/defunkt

Thanks. That actually turned out to be enough.