Kresnik on 28 September 2012
Red Alert (PS1) by a country mile. Fast paced, tactical, fun, with entertaining single-player and a great skirmish mode.
Honourable mentions:
Warzone 2100 (PS1) - took a great stab at being better than Red Alert, nearly was.
Populous: The Beginning (PS1) - fantastic game, that suffers from horrible slowdown on later levels. Otherwise, it'd probably be my favourite.
Age of Empires 2 (PS2) - faithful recreation that kept all the fun of the original, still great to play today.
Red Alert 3 (PS3/360) - silly amounts of fun, very decent port. Best I've played this generation.
I haven't played Starcraft 64 or Halo Wars, so those two could definitely be up there too.
