Defense of the Ancients (DotA) is a custom scenario for the real-time strategy video game Warcraft III: Reign of Chaos and its expansion, Warcraft III: The Frozen Throne, based on the "Aeon of Strife" map for StarCraft. The objective of the scenario is for each team to destroy the opponents' Ancients, heavily guarded structures at opposing corners of the map. Players use powerful units known as heroes, and are assisted by allied heroes and AI-controlled fighters called "creeps". As in role-playing games, players level up their hero and use gold to buy equipment during the mission.[2]

The scenario was developed with the "World Editor" of Warcraft III: Reign of Chaos, and was updated upon the release of the expansion, The Frozen Throne. There have been many variations of the original concept; the most popular is DotA Allstars, which has been maintained by several authors during development. The current developer is known by his pseudonym as "IceFrog", and has been developing the game since 2005.

Since its release, Allstars has become a feature at several worldwide tournaments, including Blizzard Entertainment's BlizzCon and the Asian World Cyber Games, as well as the Cyberathlete Amateur and CyberEvolution leagues; Gamasutra declared that DotA was perhaps the most popular "free, non-supported game mod in the world". ~wikipedia[3]

In my own words
This is where LoL and HoN started
from DotA, DotA is a game where you need strategy,cooperation and a little common sense, I think it was based on a certain place in a certain campaign within the frozen throne and some high school even use this as bettings

The game can be either lan or online
If online you will need to use either battle.net in the frozen throne
or use garena in www.garena.com

Links:
www.playdota.com ~forums information and such
www.getdota.com ~downloads for the maps

TBnick | LANnick | BnetNick | GarenaNick:
Jan_miguel - † ub3r † - none - PlayerID12345