There are so many things...

I mean I'm not restricted to the use of the Half-Life 2 games I could do a Halo mod or pretty much any game that I could expose the source to, there could be a mod. Its really just about choice, I could do zombie settlement, I could change my mind. Either way i'll probably figure out at least a few cool things with many gmaes. I could also replace source modles from Rp and replace the team names to do a first person version of Dawn of War, which would be epically cool.