Install red alert 2

Red Alert 2 is a very old game, its minimum requirements call for a Pentium II 266MHz I think. The game uses 2D graphics, so I would think your atom and its graphics chip can run it fine.

Your biggest problem will be getting the game to run on Windows 7. Red Alert 2 isn't very friendly with modern OSes. I believe there are some 3rd party mods out there to get the game running on Windows 7. Just google around for those.