Tidalis is a fucking awesome puzzle game. You link up colored tiles by pointing them at each other and making one fire a beam, trying to hit as many as possible and when others fall down they fire beams too and you can build gigantic chain reactions if your brain is up to it. As you get better you find more ways to connect tiles, passing through used up ones, tagging falling tiles mid-fall, etc and then there are TONS of game modes, special tiles and items. And how many puzzle games boast coop multiplayer?
You want a review?
Here's your fucking review! There, now go and help save the developer!
Why am I posting this? Because the development studio is in critical health, largely due to the game underperforming as nobody even bothered to look at it.
If you're more of the RTS-y kind you should look at AI War: Fleet Command but I know you guys aren't big on RTSes.