First of all, fuck you Panos. You're a fat and tall supergeek who looks like a Turkish prison warden. What kind of games are those? Zombies, fantasy shit, moar zombies, all super nerd american crap. Grow up you my old friendget.
Now, none of my old friendgets who posted in this thread can't and won't be of any assistance, they are completely useless when it comes to any meaningful form of human interaction. They can shriek latest meme garbage but be of practical use? No fukin way.
I could help you, except I won't and I forgot how to. Thing is, stupid turkish gamedev has by far the worst web presentation in bloody universe and their services are just as garbage. If you are trying to reedem bloody key from bloody box you bought on some shit sale in your smelly Athens, news are: it is fukin possible but their are some quirky things you need to do before you can put that shit in steam or even register it. AND I CAN'T FUKIN RECALL WHAT EXACTLY. Some key conversion or something stupid like that. Use these fukin useless boards search function and try to find some ancient topic started by me or some other stupid fucker who had the same issue like you have five years later. Turks never bothered to fix it, smelly Yavuz cunt doesn't care about his Greek users.
Edit: Clarification for you smelly geek cunts. If it is dead but is alive too, it is a zombie. Doesn't matter if doesn't have skin and meat so called skeleton zombie or is irradiated piece of shit from Ukraine, still a zombie dog. Beast shit from Fallout, all zombies, including your smelly avatar. Only non zombie crap are dragons cuz those are immortal so not dead so not zombie. They are fantasy just like stinky elven anuses. That's Skyrim and Witcher crap. Did I tell you to fuck yourself Panos, believe I did?