While there are a wide assortment of optional and different codec conversations for doing things in unintended ways, Kaz will still tell you that the Man on Fire 'broke free' if you Fulton him during the boss fight in 'Voices', even if you use the Wormhole. Obtaining the Wormhole Fulton (a Side-Op reward that only appears after completion of Mission 31) causes strange oddities with the plot, especially when replaying previous missions.More notably, Quiet even starts out in the Sniper Wolf outfit during Mission 40 (Cloaked in Silence ). Yet, towards the end of the game, you can equip Quiet with a pair of outfits (either her Gray XOF fatigues or a Sniper Wolf outfit) that are much more conservative and cover her, yet it has no detrimental gameplay effects. Essentially, wearing a shirt could suffocate her.

Canonically, Quiet's superhuman abilities come as the direct result of a parasite that was implanted into her to save her life, due to injuries inflicted by Ishmael in the prologue, at the cost of not being able to wear most clothing.In gameplay (and likely in an attempt to curb her near Game-Breaker status), Quiet will always brazenly attempt to shoot an aircraft in the side of its armor instead of the cockpit, leading to their attention being drawn to her and forcing her to find another position. In 'Cloaked in Silence', Quiet is shown to take out an encroaching enemy jet fighter with a single, well-timed shot into the cockpit with her sniper rifle.The cutscene will change whatever automatic rifle weapon he has into an assault rifle in the cutscene, even if the gun he's carrying by the player is non-lethal. Noticeably, in the mission 18, Snake is tasked in killing 5 prisoners, who turned out to be child soldiers. During cutscenes, Snake will always be equipped with a standard handgun and assault rifle despite what weapons the player equips him with at the time.During the ending cutscene, Snake takes out an encroaching enemy chopper with a short burst of gunfire, which causes it to immediately explode and fall to the ground. Throughout the main Ground Zeroes mission and the side ops, enemy planes are shown to be very tough to take down, and require sustained fire for a solid 30-45 seconds or three shots from a rocket launcher to take out.

Metal assault gameplay