This file is a classic example of "social engineering." It promises a premium experience for free but usually delivers a compromised computer instead.
This is server-side. A downloaded .rar file cannot "crack" the ability to play on official Activision servers. CALL OF DUTY MODERN WARFARE 2 SP MP.rar
Even the campaign has online check-ins. Authentic "cracked" versions of such high-profile games are extremely rare and are never distributed as simple, generic rar files on public forums or suspicious sites. Best Practices for Gamers This file is a classic example of "social engineering