Warhammer 40,000: Dawn of War: Soulstorm (PC Games, 2008)

This game being fun to play even without the previous ones, is simply a great Real Time Strategy. Dawn Of War has a unique setup, this expansion can be played alone without the other games, and having the other expansions and/or the original adds even more races to play as, up to nine total. I would've liked to see multiple aircraft for each race added versus a single one. Although I was a bit disappointed at the Necron race not having an aircraft unit, overall I absolutely love this game.