Call of Duty: Elite confirmed as premium-tier service, MW3

[UPDATE] Activision is planning to launch subscription service alongside Modern Warfare 3; will feature extra maps, free Facebook-like social network; beta begins this summer; first trailer inside.
Call of Duty: Modern Warfare 3 is the next chapter in the best-selling Call of Duty first-person shooter action series.

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Call of Duty: Experience 2011 - Wikipedia

Call of Duty Elite service launching with Modern Warfare 3, free and paid versions planned - Neoseeker

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Steam Community :: Call of Duty®

Everything coming in MW2 Season 1: New modes, persistent Prestige, Battle Pass & more - Dexerto