Call of Duty is one of the longest standing esport titles. Everyone knows the name as it continues to release one new title each year with developers Infinity Ward, Sledgehammer Games & Treyarch each taking turns. This year delivers Treyarchs Call of Duty:Black Ops 4 which recently announced its plans for the 2019 CWL season. Furthermore, this is the first Call of Duty to have its very own Battle Royale mode
Source: N4G PC Call of Duty – Where Is The Viewership? CWL 2019 Season.