ZombieEinstein

I honestly have a tough time imaging any way to improve this game. You can even skip the opening animations of the studio and technology ads (something I haven't seen since in a game pre-2000). You have the strategy a Tower-defense, with varying enemies you need to consider in your design - and the fast-passed action of an FPS. And whatever you may think of DLCs, theirs are good and entirely al a carte - maps $1.99 and towers are $0.99 (weapons are free updates). You can even pull in players who do not have a particular map for a round or two of multiplayer - also something that I haven't seen in a while (Starcraft 1 with their "Spawn" system I believe was the last time I saw something like this). What more do you want for $10?