They mixed up the definitions of 'really good' and 'must play'
A game like MGS could never be a must play, because even though you and I might love it, some people will be bored to tears by the cutscenes. All the RPG's come under the same classification
many people will not feel any need to play GoW, or GTA
And don't even get me started on racing sims - whilst I can recognise that it is a franchise that appeals to its (very big) audience, Racing sims like GT bore me - give me turtle shells and bananas while racing please.
The only 3 I haven't commented on I know next to nothing about.
In conclusion, 10 good games, 0 must play games