Hero Dota

Heroes are the essential element of Dota 2, as the course of the game is dependent on their intervention. Players are split into two teams of 5, and can select a Hero from a selection panel. Heroes all have different play styles that stem from unique abilities and combinations of attributes. Over the course of the game, Heroes will accumulate experience. Once a Hero has enough experience, they will level up, making them more powerful than before and allowing them to level up new abilities. Most Heroes have a distinct role that defines how they can affect the battlefield, though many Heroes can perform two or more of these Roles.
Currently, 110 of the 112 heroes are playable in the main Dota 2 client. For a table of heroes sorted by attributes and mechanics, see Table of Hero attributes.
From:http://dota2.gamepedia.com/Heroes

Dota 2Review

Dota2  Review

By:eurogamer.net
It's the summer of 2010. Typing to a backdrop of Chatroulette and Chilean Miners, it becomes clear that none of us in the Rock, Paper, Shotgun staff chatroom, where I worked at the time, know how to react to the news that Valve, a company famous for giving gamers what they want before they know they want it, is making the sequel to Defense of the Ancients.
Today, Valve's characteristic accuracy is intact. Dota 2's beta is the most popular game on Steam, boasting a peak of 329,977 simultaneous players. This falls far short of League of Legends, Dota 2's biggest competitor, which was able to boast five million concurrent players earlier in the year, but this month the real race starts. Valve is rolling out access to Dota 2 in successive waves, and while Dota 2 is arriving late, it's doing so with an inarguably more generous free-to-play business model, which only charges for cosmetic upgrades.
Yet for the growing shadow that Dota 2 casts, it remains intimidating, or even bizarre to all of us looking in. Which isn't unfair. Dota 2 is bizarre. It's a game where a cockney porcupine can work together with a god of destruction and a ghost to try to temporarily kill a particularly high-level tree.
But Dota 2 represents something far larger than the sum of its endless, mismatched parts. Let me put this as simply as possible.

Next, the thing to know about Dota 2 is its comedic scale. It currently offers 102 unique, playable heroes from the original Dota's roster of 112, and with matches frequently lasting 35 minutes (though occasionally stretching past an hour), you're looking at more time than you ever spent in Skyrim just to try them all. Every hero has different stats and four unique skills, but can also be equipped with any one of almost 130 items.

By:ign.com

Dota 2 promises to take the unique blend of online RTS and RPG action that has made Dota popular with tens of millions of gamers and expand upon it in every way. This is a competitive MOBA game of action and strategy, played both professionally and casually by millions of passionate fans worldwide. Players pick from a pool of over a hundred heroes, forming two teams of five characters. Radiant heroes then battle their Dire counterparts to control a fantasy landscape, waging campaigns of cunning, stealth, and outright warfare