So I'm still playing my POX game. So far I've managed to make it to the 5th arena. Getting there was surprisingly difficult. I actually spent almost all day yesterday trying to clear the 4th arena. I have three active Infectors, but Fdoppp is still my strongest and primary fighter. After the third arena there haven't been any hidden areas as far as I could find. I'm going to go back and see if I missed something in though.