User blog comment:Callofduty4/Why is it a sin for Treyarch to rip some aspects off of Infinity Ward but OK for Infinity Ward to rip off some stuff from Treyarch?/@comment-63.148.122.101-20091228175817

why did they add commando pro, marathon pro, and lightweight pro to the perks? did they want to make this game like halo? that's my only gripe. I like the fact that call of duty seemed somewhat more "realistic" than other FPS, but these perks just 'eff it all up.