MGS2 Substance est une édition spéciale de Sons of Liberty sur Xbox. Outre la possibilité de refaire le jeu en choisissant son personnage, il est proposé plus de 200 missions en réalité virtuelle. Celles-ci visent à exploiter les recoins du système de jeu tout en mettant les talents du joueur à l'épreuve. A cela s'ajoutent aussi diverses mini-missions inédites prenant place dans le jeu original, un jeu de skateboard aux couleurs de MGS2 et quelques autres bonus.
She gave my mother such a turn, that I have always been convinced I am indebted to Miss Betsey for having been born on a Friday. The word was appropriate to the moment. My mother was so much worse that Peggotty, coming in with the teaboard and candles, and seeing at a glance how ill she was, - as Miss Betsey might have done sooner if there had been light enough, - conveyed her upstairs to her own room with all speed; and immediately dispatched Ham Peggotty, her nephew, who had been for some days past secreted in the house, unknown to my mother, as a special messenger in case of emergency, to fetch the nurse and doctor.
