there is no need for GFX card to play yester year games. i played warcraft on intel 810 with 128 mb ram and PIII 500.
anyways, RTS like
warcraft, Age of empires, age of mythology, empire Earth I, rise of nations are excellent games.
then comes turn based strategy, which is lead by games like Civilization series.
commandoes is a different breed of game. it's a 3rd person action game