Question: The video game franchise that Patrick Price is a professional player for began on what platform?
Sentence (from "ACHES"): Patrick Price, (born July 18, 1994) better known by his gamertag ACHES, is an American professional "Call of Duty" player who was most recently the captain and playing the slayer role for Cloud9; He previously played on 100Thieves the team that was founded by Matt "NaDeSHoT" Haag.
Relevant evidence: Yes