League of Legends was released on the 27th of October in 2009 for the Microsoft Windows platform. The idea of the game comes from the very popular Warcraft 3 mod, Defense of the Ancients(DotA). Some DotA developers are involved with Riot Games and are continuously working on League of Legends.
The overall gameplay is very similar to DotA. Two even teams fighting each other to destroy the opponent's Nexus. Each player(in League of Legends called summoner) controls a champion to fight through defensive turrets and waves of creatures(minions) to reach this goal. There are over 80 champions with different abilities to choose from. Champions can be equipped with six items. These give League of Legends a huge variety. Please note that the Dominion game mode will be released soon, which will be quiet different from the above. Champions won't be able to damage the opponent's Nexus by attacking it, but by capturing and controlling zones on the map.
If you like fast paced action real time strategy games with some rpg elements, you should try out this game. You can register an account and then download the game client from the official site.