guys, am in the process of wanting to make a football game and am unsure if unity engine is capable of doing this ?? as most of the stuff looks geared towards FPS and similar genres.
The engine is capable of doing just about anything. FPS is definitely not the only thing it can do.
American Football or World Cup Football 
But I suppose it all depends on what kind of approach you are doing, and what platform you are using (Web, Standalone, Wii, or iPhone) as each have strengths and weaknesses. In my opinion the one of the biggest/fanciest things I have seen done with the Unity is Fusion Fall (http://www.fusionfall.com/index.php) which is an MMO.
I think there are a lot of FPS in the tutorials and what not to show the ease of setting up Unity with a few simple scripts to make an interesting playable demo. Something that has (sports) rules and team AI could be done, it is just harder to show off as a demo.
world cup football 
i’ll look around the engine a bit…see if i can the hang of it properly…
The Unity engine is capable of any genre. New users come in and say, “Is an FPS possible? Is an RTS possible? Is an MMO possible? Is a Platformer possible?”
The answer to all of these is just “Yes”. It might sound like a cliche, but you’re really only held back by your skill and imagination.
Unity is not a drag’n’drop system like game maker or fps creator, it has a wide range of programming options too, therefore it’s not limited.
I am making a baseball game and its going fine with Unity. I had to do some of the physics programming myself because the stock physics didn’t feel right. However, that part was quite easy really.