there needs to be more upgrades. like a diesel engine, nitrous oxide, being able to armor the glass with metal, more upgrades to the current menu, like you can see every zombie in the perception or getting a M16, and maybe some things that wouldn't ever happen like a nuclear reactor, rocket launchers, machine guns in hood, and stuff like that.
hey heres a cheat that works choose a new game select your character and then right click and click play wait for a few seconds and you have a lvl 50 character and unlimited gold.
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