Football games, Sensible Soccer, of course, though you will see a lot of replies with people talking about Kick Off 2 (hello Riempie
War Strategy, I'd go for something like.. hmm.. Fields of Glory? Or Powermonger. You could also try Dune 2 if you like the Command &Conquer type of games (this game is the precursor fo them all). I'd also recommend Syndicate.
I have never been a savvy RPG fan, but I liked Darkmere, and if you like console-type RPGs (Zelda stuff I'm talking about), get Speris Legacy.
Space conquest, I dont know. Perhaps UFO?