mhazell wrote:General Chaos supported 4 players, as far as I remember. Depends if that sort of game is your cup of tea, though.
Off the top of my head, there's also Columns 3, but unfortunately that's Jap/NTSC only.
I'll second General Chaos. Fantastically frantic and hilarious strategy game, glad someone else mentioned it. Loose copies are on the Bay for £3-£5, and there's CIB copies going for less than a tenner (one's even going for £7.25). For that cheap a price I'd say it's well worth a punt.