There're better zombie survival games, both in gameplay and in graphics quality. I would prefer the spin wheel to give out weapons or armor and better airplane drops, but the worst is a "survivor" NPC (bot) that appears out of nowhere and attacks, without being bothered by the zombies, and impossible to kill. He usually appears 3 minutes after I reach a place and begin gathering. I guess the pro version is more of the same, therefore not worth to spend money on.