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Click here and read how SteamDB works. However, you are preordering a game, that means that Steam can still change the region restrictions. But since it's only 4 days until release, the SteamDB entries probably will not change anymore.

you probably need a vpn to activate due to region set
but thats not a problem at all...so who cares

Until now, it is region free and you can activate it without problems. This can, however, change in the future, as they can region lock it.