David Kirsch

David "Zoid" Kirsch is a computer game designer and programmer. His first notable project was Threewave CTF (Capture the flag) modification for Quake, in 1996. He was hired by id Software in 1997 to develop the CTF modes, which he over time implemented for Quake II and Quake III Arena. He was also one of the leading programmers of QuakeWorld. At id, he was also one of the people responsible for maintaining the Linux ports of id games.

Prior to his involvement in the Quake community, "Zoid" worked for MIND LINK! BBS in Vancouver, BC.

In 2000, Kirsch departed id to work in Retro Studios. There, he ultimately ended up as a senior programmer for Metroid Prime and Metroid Prime 2: Echoes.

Kirsch is currently employed by Valve Corporation, working on Dota 2.