The graph shows the top search terms for these 4 video games over the last 5 years on google.
Minecraft is the obvious winner, never really losing steam and even making a comeback as of last year and regaining the top position over Fortnite in the last months of 2019 with the new update. It was the most popular in December of 2015.
Fortnite has been the fan favorite over the past 2 years hitting the scene in 2017 and then picking up a lot of steam in 2018, finally hitting its peak in October 2019 (when Chapter 2 was dropped) and quickly falling out of most peoples radar again.
Overwatch has maintained consistent numbers although it looks lower than the other two beastly numbers. The trend of Overwatch is dying is simply not the case, true fans have been around and continue to be loyal to the game. Overwatch had it’s peak when the game released. Expect another peak when Overwatch 2 is released.
Call of Duty I put on the map as the constant. the obvious old guard of FPS video games has achieved some success with its new mobile game but it seems to be a niche game that die-hard fans come back to much like Counter-Strike and other games of this genre.
search trends can be found at www.trends.google.com