The title is the featured game of the 2021 Season and Call of Duty League. This was the first title to return to 4v4 player count. Matches were contested in best of 5 series with Hardpoint, Control, and Search and Destroy being the three game modes. The series layout was HP/S&D/CON/HP/S&D. In the grand final Best of 9's, the series layout was HP/S&D/CON/HP/S&D/CON/S&D/HP/S&D.
On August 31, 2020, Activision announced that competitive would be switching back to 4v4 after two years of 5v5. The season featured Apocalypse, Express, Raid, and Standoff getting added into the competitive map pool throughout the year to replace many of the initially included maps. The 1-0 advantage in grand final Best of 9 series for the Winners Bracket team was removed. Although the Winners Bracket team still has the veto advantage.
Call of Duty League
- Chicago Huntsmen rebrands to OpTic Chicago
- OpTic Gaming Los Angeles sells their slot to 100 Thieves and becomes Los Angeles Thieves
The season started on January 23, 2021, with the Kickoff Classic. The twelve teams faced off in showcase matches to celebrate the one year anniversary of the league. With a full season of online matches ahead, the league's format changed to have five stages - each with three group play home series and one major. The first three majors of the season took place online, with Atlanta FaZe winning the first and third with Toronto Ultra taking them down in the second major. Atlanta FaZe took the first major back on LAN and Minnesota RØKKR performed a Best of 9 reverse sweep against Toronto Ultra to win the Major 5. Atlanta won the regular season for the second year in a row with 525 CDL Points.
Only players who made an appearance are listed
Call of Duty Challengers
The entirety of the 2021 Challengers season took place online. Tournaments took place almost every weekend from December to August in the three regions. Additionally, North America and Europe hosted "Elite" leagues for the Top 8 teams in each region for more prize money. The regional finals were won by We Are Trying Now (NA), The Atlas Lions (EU), and Renegades (AP)
- Black Ops Cold War Competitive Rules
- Call of Duty League Championship 2021
- Call of Duty League 2021 Season
- 2021 Tournaments Portal
- Black Ops Cold War on Wikipedia