• 15 years ago, the release of the tower defense game "Defense of the Ancients" (DotA) on the Warcraft III platform marked a significant moment in gaming history. DotA, created by anonymous developer "Eul," introduced a new genre of gameplay that involved strategically placing defensive towers to protect a base from waves of enemy units, a concept that had not been widely explored in mainstream gaming before.

• The success of DotA paved the way for the emergence of the multiplayer online battle arena (MOBA) genre, which has since become one of the most popular and lucrative gaming genres. Games like League of Legends and Dota 2, which are direct descendants of DotA, have amassed massive player bases and become staples of the esports scene, with millions of dollars in prize money and a dedicated global fan base.

• The impact of DotA's innovation and the subsequent rise of the MOBA genre has been far-reaching, influencing the development of other games and genres, and inspiring a new generation of game designers to explore the potential of player-created content and community-driven game development. The enduring popularity of MOBAs and their influence on the gaming industry as a whole demonstrate the lasting legacy of this pioneering tower defense game.