It's an RPG based on the Paper & Pencil game AD&D. (Advanced Dungeons & Dragons). And according to Metacritics.com it is still under the Top 10 games of all times. You guys may know the "Neverwinter Nights" series, which were something like the inofficial sequel to Baldurs Gate.
LoL is a DOTA clone, while the original DOTA was just a usermap for Warcraft 2. It's a kind of RTS idd. (Same kind as the Warhammer 40k series for example).
Interesting sidenote: The whole tower defense genre is a sub-development of the original DOTA concept. Yay. I fucking love Tower Defense. (Defense Grid :wub: )
i love tower defence games! bodhi if u like them thers a site which collects only td games! its called turretdefense.com or similar, google it i dnt remeber