i don't know what space rangers is?
Mystik, it's one of the best games recently. Space Rangers 2, which you can actually get through Stardock.
For the most part it's a very open universe. The game itself is a mixture of many different genres. The main portion is you flying around in a 2D environment, trading, fighting, questing, etc. You have a character that you can upgrade, along with the equipment, obviously. But some of the quests involve working in an old-school "Zork" kind of text adventure. There's the possibility of RTS, if you want to have robot fights (which I'm not so fond of, but mostly because my computer can't handle the graphics). And when you go into black holes you're in an arcade environment. Overall, it's a great game.