DIE RISE is superb in my view and is a sort of hybrid between TranZit and Survival... (clearly no bus but you have to travel around the map to unlock stuff) The introduction of the PDW, AN94 and SVU have improved the weapon choice and effectiveness hugely. I rarely spin the box anymore. The PDW and AN94 PAP'd are plenty in the main.
Use of the catapult strategically can be used to great effect.
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There are good areas to train Zombies, there are areas where you can end up in deep doo-doo...
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Fair to say that I'm pretty addicted to DIE RISE at the moment...