Valve Corporation is a gaming company that is among the biggest players in the gaming industry. The company has plenty of successful titles, mainly shooter games, under its belt, which include the game that won more than 50 game of the Year awards, Half Life and Half Life 2; Left for Dead 1 and 2; Team Fortress 2, Counter Strike, and Portal 1 and 2. It is also the company behind the hugely popular gaming platform, STEAM.
DotA 2 is a Massively Online Battle Arena where players compete in a 5-vs-5, arena-like match where they play as heroes with separate sets of skills and battle among themselves. The game is based on the popular Warcraft 3 mode of the same name that has given birth to the new MMO genre, MOBA.10rate