been playing with battlefront - a diablo like role playing game - easy controls, UI and lots of fun - the game mechanics are intuitive.
Another game - more mature rated - is contract killer - essentially you are an assassin and you need to take out targets using guns, scope - requires a massive 300mb download so make sure you download while on wifi
RASTAVIPER, Thank you so much for responding about the Raging Thunder game. I have no clue if this is the same game as what is in the video sample I posted, but it's fun and works for me.
Found a new one out there. Gun Bros. HD Be prepared for a huge download of data (300 mb) the first time you start the game. This one is a fast paced top down shooter. Excellent graphics but requires lots of resources. I had to shut down almost everything running on the nook to get this one to start. Not sure but I believe from the reviews this one was designed for the tegra tablets.