Nitpick: DotA has existed for a while now, nearly 10 years. I remember playing the imbalanced 5.5x versions somewhere around 2004. The modern versions of DotA w

Nitpick: DotA has existed for a while now, nearly 10 years. I remember playing the imbalanced 5.5x versions somewhere around 2004. The modern versions of DotA were the 6x, started in 2005, and they are basically the basis for all modern DotAs (Heroes of Newerth copied heavily the map layout and some of the heroes ; it was pretty successful until DotA 2 came out). DotA 2 is basically an engine overhaul of DotA.