- Nikolai Stepanovich Sokolov's survival was explained in the Metal Gear Solid 4 Database by claiming that he took a False Death Pill during his interrogation by Colonel Volgin, which was given to him by The Boss.
- The cell where Naked Snake is locked in at the beginning of the game seems ridiculously easy to escape from, especially considering the room next to it just happens to have a CQC Enhancer suit that conveniently fits Snake. It was Roy Campbell, who unscrewed the vent in question, but was unable to actually use the escape method in question due to being relocated to a different cell before he could even get the chance to use it. Cunningham was probably responsible for unscrewing the other vent and leaving the MK22 and CQC Enhancer suit with Snake's size, however.
- In the manual for Metal Gear 2, Campbell's bio mentioned that he was, during this time, the only officer to remember the FOXHOUND of the Big Boss days, which made absolutely no sense when the information about FOXHOUND explained that it was formed in the early '90s, which meant that FOXHOUND was around for, at the absolute earliest, nine years. This game explains exactly what the bio meant by that.
Fridge / Metal Gear Solid: Portable Ops