with some holiday time coming up i thought it might be interesting to look to try and make a game thats been in my mind with a while now. 

im a professional programm so i have experience with most common languages (and am not scared of picking up a new one if need be) but ive never done any graphics or game work before.

basically what im after is an engine or tool set that will allow me to create a simple fps (based around interaction with world objects, not physic based, just buttons) while hopefully avoiding as much graphics-y code as possible (dont get me worng, im willing to learn it, i just dont want to spend my nights writing a lighting engine ;) ), so that i can spend my time on logic and concept.

tl;dr **Im looking for suggestions (and if available tutorials) for a simple engine to make a simple fps on**

i might be wrong be it seems that some thing like UDK might be graphic over kill, im happy for this to be ugly as hell.

as always, any help pointing me in the right direction would be amazing.
thanks!