[[folder: Fridge Brilliance ]]
* Many people question how the mission ranking goes down when people (and the '''VideoGame/MonsterHunter''' creatures for some reason) are killed. Simple explanation? The game is titled Metal Gear Solid: ''PEACE'' Walker for a reason, as (besides Peace Walker being the game's DiscOneFinalBoss) peace is one of the main themes of the game.
* Liquid Snake's ImplacableMan status becomes at least a tad more justifiable (though no less ridiculous) when you compare his feats with what Big Boss goes through in Peace Walker, most notably [[CharlesAtlasSuperpower bench pressing]] [[HumongousMecha the legs of Peace Walker and ZEKE along with the whole of the Cocoon.]]
* The [[AKA47 SUG]] assault rifle has a scope on it, but aims like any other assault rifle in the game (ie. using the over the shoulder camera). It's more than likely that Snake (or whichever of his MSF soldiers) is aiming using the [[ShownTheirWork iron sights mounted on top of the scope]].
** Actually, the scope used by the AUG/SUG provides only with 1.5x magnification, and in overall works a bit more like a reflex sight than a traditional scope. Perhaps this adds to the in-game weapon's ease of use and aiming.
* Much has been said about how TX-55 is so 'outdated' compared to the canonically preceding ZEKE, and a good part of this always seems to go towards the fact that the TX-55 is much smaller in size than it. However, is this really a sign of older technology... or actually the contrary? For starters, while being smaller, it still nonetheless possesses not one but two nuclear launchers. That alone would make it more advanced in the main role of the Metal Gears, that's it, of a nuclear weapon. A more compact size would also be translated in cheaper price, and thus easier mass-production. Oh, and it would also be able to aid infantry in places where ZEKE would be too large to go in, thus also fullfilling Granin's original idea of a bipedal tank as well. All this could apply to D, as well. Strangelove, in one of the cassette tapes, mentioned something about how scientists are starting to find ways to miniaturize robotics as technologies advance. Maybe this could be a very subtle hint at how actually more advanced TX-55 is, at least in some aspects?
** Of course, it seems to matter less considering that Zeke [[spoiler: will presumably be destroyed in ''MetalGearSolidV'']]
* Despite the fact that [[spoiler:Paz is a double agent with a different nationality than what's said, she still speaks with an accent and uses a few phrases native to Costa Rica in the final boss fight, despite the fact that she's dropping the facade. Her diary shows her [[BecomingTheMask warming up to Motherbase]] and wishing she could keep up the facade a little longer. It might be a sign of her wanting to stay as Paz and not be Pacifica anymore.]]
* There's another reason why Snake/Big Boss didn't really buy the "professor's" cover story about being part of the UN's University of Peace in Costa Rica: although the country actually did abandon an armed military by the time the game takes place, the university ''didn't exist'' in 1974. It would be another five years before it was even founded.
[[folder: Fridge Horror ]]
* In one of Huey's briefing files, Huey explains that Peace Walker was equipped with a hydrogen bomb (specifically the large, "Death Star"-esque orb on top), larger both in size and magnitude than even the Soviet Union's Tsar Bomba. Huey explains that the reason why it has it on there is basically so that, if it needs to do so, it can infiltrate a nation and basically self destruct and take the nation with it. Now, recall earlier that Huey mentioned that Coldman planned on mass producing it throughout Central America, something that Hot Coldman later states as well, and you'll gain the realization that, if the mass production actually happened, and if Hot Coldman, or heck, any madman controlling them were to decide to activate their self destruct option, that means Central America would also be wiped off the map.