AirMech is a top down real time strategy game. Well, it's more of a tactical game really, resembling the likes of DoTA, HoN, LoL etc. But those don't have anything on AirMech. Airmech is faster, more challenging, has better controls and you drive a jet that can transform into a mecha which shoots lasers. Lasers!
It's really a re-imagination of the game Herzog Zwei which came out for the SEGA Genesis back in 1989. So if you're my age you might even remember the pre-cursor to this game. Either case, It's awesome, and you should try it.
You can find it over at Carbon Games. And it's free. There's both a PC and a Chrome (the web browser) version on there. I recommend getting the PC version thought. The Chrome version got some FPS issues.