Call of Duty: Modern Warfare 2 launched on 28th of October priced at $70, around a month ago. Now the Black Friday is coming and some retailers are going for discounts on the newest entry in the series.
The usual rate of discounts are around 20% mostly, though it is not known if there will be any better opportunities may come up during the upcoming days. Since the game has been enjoying a successful launch, it does not seem very possible at this stage.
A previous example in the series, Call of Duty: Vanguard, was not as successful as Modern Warfare 2 and it saw heavier discounts during the time.