NFL Star Chris Johnson 'I'm 100% Unstoppable'

Chris Johnson -- the superstar running back on the Tennessee Titans -- got a 99/100 skill rating in the new Madden NFL 11 ... but according to Chris, having the highest rating in the game just ain't enough.

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Johnson tells TMZ, he's honored his character got such a high rating in the game ... but according to him, anything less than 100/100 isn't accurate -- "In real life, I'm 100% unstoppable.  I got no home. I run for days."

Johnson's in good company though -- other players in the game with 99 ratings include Peyton Manning and Drew Brees.