I've heard/read about a lot of people saying that O.R.B is a Homeworld clone. I never played Homeworld, but I have to say, O.R.B is a great game. It brings more of a challenge as opposed to other strategic space games, and plays really well. The graphics look fine, and there are many levels to play. There is even a mission editor that you can create your own missions in. The storyline is good too, and I think that the soundtrack adds a lot to the game. I would definitely recommend this game, I would pay $30 for it. (Also, if you want to cheat, just press "Enter" while on the map screen, and type these codes in: $RU10000000 $SU10000000 and $GET ALL TECHS)