According to Treyarch design director David Vonderhaar, every person who plays this year's Call of Duty: Black Ops II should log time in the game's multiplayer mode. In an interview with Activision's One of Swords blog, Vonderhaar said the game's updated Combat Training mode was developed as a means to bring more players into the virtual battlefield. Treyarch wants Call of Duty's multiplayer ranks to rise.

“As popular as [Call of Duty] is, there are a lot of people who don’t play [multiplayer],” Vonderhaar said. “And quite frankly, this bugs the sh** out of us. They should all play [multiplayer]. And Combat Training helps us get there.”

Treyarch updated Combat Training for Black Ops II in a number of ways, the first of which is that the first ten levels gamers gain in this mode will transfer over to players' public ranking. Gamers can also earn experience points (XP) beyond level 10 for objective-based gametypes in Combat Training, but only at a 50 percent XP accrual rate.

Black Ops II hits store shelves for Xbox 360, PlayStation 3, and PC on November 13, with a Wii U release following on November 18. A PlayStation Vita game--Call of Duty: Black Ops Declassified--is due sometime this fall.