Metal Gear 1 crashes constantly. The already significant amount of looping back as part of the game is a lot by today's standards. When you double or triple that for each section for each crash that occurs, the experience gets abysmal. If you want to "purchase" the game, then buy this, but I recommend simply emulating the games after for a more stable experience, with a bonus of better rendering quality...

!NoticesYou! *Summons hole in floor* UwU ! ! !