You will need to find this DRM-less exe file yourself. Requires a DRM-less exe, place R6Vegas2Game.exe in the Tom Clancys Rainbow Six Vegas 2 folder inside Nucleus Co-op handlers folder. Open Nucleus Co-op, search and download this game handler in the Download Game Handlers option. Run the game as an Administrator in its Properties option as shown in this guide and launch the game from its. Tutorial: Download latest Nucleus Co-op and extract it. Make sure you have downloaded, installed and are currently using the new Ubisoft Connect game launcher (formerly Uplay) from our website > If the Steam launcher refuses to launch the game after pressing play, could you please check through the following steps that have been known to resolve this for other players > Under Select Game, choose Rainbow Six: Vegas 2 from the dropdown list. Hello everyone, sorry to hear you are having trouble launching the game on Steam.