The game keeps asking for a serial cd-key when i launch the game and i can't seem to find where this key is located in any of the options. Where can i locate thiskey for my Redemption GOG Copy? i tried searching everywhere in my library Redemption Settings or More options and i just can't seem to find this damn key... the game will launch but there will be this tiny screen asking for the serial key as soon as i launch the game. Any help is apreciated.

Using Latest Windows10.

Some people had the same problem, for example:

https://www.gog.com/forum/vampire_the_masquerade_series/masquarade_cd_key

"There is not a serial key in that menu. According to the support, there is something wrong with my installation or the compatibility with my version of windows, not a missing key. I will attempt to check all that and correct the problem. "

Just reinstall the game and try it again.

Dang, i thought it was just me. I notices my Steam version contains a "RegisterGame.Bat" file, i think i could just use tht instead. GOG should provide a Register file or at the very least a Serial in order to avoid this issue.