According to the latest information published: Modern Warfare II will be officially released on October 28th.
Before the game was even released, the following information was given: The game will be able to be played in multiplayer around the world and special operations can be performed. At the same time, the RICOCHET Anti-Cheat system is integrated into the game. We need to level up to get more weapons. In summary, there are add-ons for weapons, a leveling system that we are familiar with from previous games for more weapons.