Haven't seen it mentioned on here before (at least in the last 3 months per search)

It's basically the WC3 map Defense of the Ancients as a stand alone game.

Its free to download and play, you get 10 champions for free each week.

You can buy others with points from wins, or paying cash for points.

feel free to add me with the nick Followthehollow if anyone plays/tries it. I play Morgana 99% of the time.