Discovered by our reader KSA.
You have to copy an exact folder from the World of Tanks game files, this one, into Steam’s WoT folder:
Steam WoT folder:
Just in case, also make a backup. Rename the Steam win64 and keep it:
Another way of doing it:
You need to download the Steam version of WoT. Then, copy file “wgc_api.exe” from the non-Steam game folder to the steam folder and rename it to “wgcs_api.exe”.
There’s no achievements, trading cards or any other reason to have it on Steam. If you want it for the Steam overlay and friend chats, just add it as a non-Steam game and it will bypass the WG launcher.