Original Post — Direct link
I bought rainbow on steam and can i launch it with uplay without steam?
about 3 years ago - Ubi-Wan - Direct link
Hello there, Kousei279! Welcome to the forums. You may be able to, though typically it's preferred to launch your game from the platform from which you purchased it, to avoid any potential key errors.

Just to be sure, are you having trouble launching your Steam purchase of Siege?