Urban Combat 101: An Article by Vigilante
In this first article by me I will give you the basics and factors you should be aware of when playing in an Urban Environment. I am using screenshots from videos recorded by me from games played at my school to help illustrate my points.
1. Your Environment

Know your environment. Knowing the environment allows you to use it to your advantage and avoid disaster areas such as a floor full of glass. Why would you play on a floor full of glass anyways? Know the size of your area so you know how far your guns can engage and engagement points. Know escape routes, and know where the boundaries are in games.
2. Cover

I assume that since you are reading this you will be playing in some sort of Urban place. Use the cover that the environment provides you. Anything that blocks darts from hitting you I consider cover. Use trashcans, benches, and corners to protect yourself. If possible and not against the game rules feel free to move the cover to a position that better suits you.
3. Positioning

In this picture you the game is starting off and these two players are rushing to the trash cans so get cover and position. In the picture used for
EDIT: Weird I formatted my post for the forum but it cut it off. Check the best of it below.
http://basicnerf.wordpress.com/2010/01/29/nerf-urban-combat-101/