The Labour MP Tom Watson has amended an Early Day Motion by fellow MP Keith Vaz, which called on the BBFC to "take further precautions" on the sale of games, citing Modern Warfare 3's controversial portrayal of a terrorist attack on London.
Watson's amendment to the EDM defended the game.
He "encourages the BBFC to uphold the opinion of the public that whilst the content of video games may be unsettling or upsetting to some, adults should be free to choose their own entertainment in the absence of legal issues or material which raises a risk or harm."
The amendment also notes "the game neither draws upon nor resembles real terrorist attacks on the underground."
"Keith, for many year, has been very critical of adult content in video games and he's homed in particularly on the Call Of Duty franchise," Watson told The Guardian.
"He's tabled a motion, about a week ago, condemning the game. I just amended it to make the point that the game has an 18 classification and that the BBFC said in a statement that it bore no resemblance to the July 7 bombings in London - which is what he refers to in his motion."
"There may be disturbing or unsettling content in that game, but adults should have the choice as to whether they want to play those sorts of games or not."