Came here to comment the same. I was making fun of my housemates for being addicted to DOTA (a MOBA game), then during a "Use Map Settings" game of Starcraft I discovered and enjoyed playing a mod called "Aeon of Strife" and shared it with my housemates.

DOTA is a direct descendant of Aeon of Strife.

I had discovered the original DOTA, inside Starcraft.