As this exciting year of Modern Warfare II kicks off with Campaign Early Access on October 20, do not be left behind with this transition to the new era of Call of Duty.

Buy Call of Duty: Modern Warfare 2 | Xbox.

Warzone uses Blizzard's Battle online gaming servers. Other games that use those servers include Overwatch, World of Warcraft and StarCraft 2. This means that you don't need to have a Steam account in order to play the game, but rather you need a Battle account.

Valve's Steam service is a must-have for any PC gamer. Its excellent selection, recommendation features, and deals make it one of the first applications to install on any gaming PC. On Steam Deck, it's essential.