CnC Online is the only reason RA3 multiplayer still exists. They host the official patch files on their website.
Patching legacy titles can sometimes reset display configurations back to default aspect ratios. red alert 3 patch 113 download free
Launch Red Alert 3 through the C&C Online interface to access the functional in-game multiplayer lobbies. Troubleshooting Common Installation Errors CnC Online is the only reason RA3 multiplayer still exists