The question you asked was about a video game.  From the [SU FAQ][1]:

> Super User is for computer enthusiasts and power users. If you have a question about ...
>
    * computer hardware
    * computer software
>
… and it is **not about videogames or consoles**, then you're in the right place to ask your question!

I am not aware of any SO-type site available yet to target videogames, although I can imagine that one would be pretty successful.


>Why is a single user allowed to close a question on superuser as opposed to 5 on stackoverflow?

Diago is a moderator on SU. Moderators have the power to singlehandedly close questions.


  [1]: http://superuser.com/faq