For me, I still regard my LAN PVP 6 players on C&C Zero Hour comeback as not only my greatest win but my best comeback in history....
Basically I was using the steath terrorist side, all the other 5 players had decided I was the biggest threat and they all tagged up vs me and SW'd me to oblivion....or so they thought...I faked them out with some fake base buildings and some verbal abuse and pretended i was running around with just a stealth handful of infantry, when really I had sneaked away quietly about 30 minutes earlier with just my essentials and a few black markets (all stealthed) away from all the battlefields.
All my mates being cocky twats and started yelling abuse at me since they had never beaten me ever, and were all full of over confidence and gloating prematurely by deciding I wasn't worth finnishing off and all turned on each other for power struggles...making my life very easy provided I kept everything stealthed, which I did. In roughly 15-20 minutes I had my base back to full power with about 10 Black markets pulling my income and stealthed, with all my mates too hooked up with thier own problems to be worried about where the heck I was....until they noticed 6 SW's all complete at the same time lol...gradually i chewed everyones Sw's to zero with my 6 in a row blasts and took the win in roughly 2 hour uber match.