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Asura offline GOG distributive contains only 64-bit versions of two EXEs (regular and Vengeance) along with steam64.dll.

It means that devs just palmed off the Steam version to GOG. I know that Steam has quite bad options for storing distributives, and developers prefer to store 64-bit versions only (maybe sincerely thinking that everybody now have 64-bit systems).

I contacted the GOG Support for this issue but have no answer yet.

So be forewarned, those who use 32-bit OS.