Ogre is no gameengine, it's a graphicengine. So you need to script your own tools and systems.

I would suggest Torque Game Engine if you don't use shaders. You can use the "demo" for free to try out and learn the engine (it includes all functions and features).

If you need shader, maybe try the Torque Game Engine ADVANCED. It's harder to work with this and you have less documentation.

(I suggest those engine cause im working with it and i'm very happy with it )

The prices for both engine are between 150 and 250 dolla (for indie license, which is enough to sell games if you dont earn more than 250.000 dolla per year or something)