Offworld Trading Company
It's an real time strategy game but without any units or armies or battles. It's all about economy and macro skills. You're a company on mars, you harvest resources and sell them on the open market (which is shared with all the other players). You win the game by buying out the other player's companies without having yours bought out.
There's competition but it's mostly indirect, which is really cool. It's just not a typical RTS so most of my RTS skills don't really map to it.
I had a great time with the tutorials and lower skilled AI games but as soon as I tried playing with real players or "normal" AI I just got destroyed. I feel like there's a gap between the end of the tutorials and actually understanding the early game strategy for a real skirmish game.
I'm still experimenting with it but if I can't figure out the strategy soon I'll probably set it down unless they patch in more tutorial. If you're an RTS fan you should definitely take a look at it. It's a unique take on the genre that at least deserves a little bit of your attention.