Battlefield Vietnam (the one that released after 1942)
I had so much fun with that online but I'm assuming nobody plays it anymore.
I have the CD-ROMs… it's one of the games that won't convert to Origin (I think 1942, BF2, and 2142 converted after speaking with a phone rep) 😢.
If I only had the resources and players to build out a computer lab!
I'd normally say SOCOM II, but with Xbox Dev Mode and Steam Deck, it's now a reality for me. Would still love BF Vietnam and Bad Company 2: Vietnam to come back.