In which of the MGS series are you able to equip the Stun Knife

The answer is based on language.

If you have a game localized in a specific language which your game does not support for your region and you try to import that saved game, it will not work; however, if the save game is localized with multiple languages, one of which is yours, then it should work. Operative there is, 'should', and I say this because no game is developed the same way and there is no ISO on how a save game should be developed.

Through various sources I have compiled the following bio stats, where they have got the stats from I'm unsure however:

• Solid Snake was 178cm in 1999. This was cited from Metal Gear 2: Solid Snake - User's Manual, Konami Corporation (1990).

  Interestingly he is also stated as 182cm from 2005-2014. This is cited from The Mk.II displays this information on-screen in-game and also the Japanese Konami website

• Liquid Snake is 183cm cited from Konami

• Solidus Snake doesn't list a height I'm afraid. I can't find anything from any notable sources.

• Big Boss is 192cm cited from Konami entry for Big Boss, but also stated as 180cm for 1999 cited from the same user manual as the 178cm entry for Solid Snake.

So really, being cloned seemed to f*ck shit up and make them grow a few inches between games. Big Boss grew 12cm between beginning of the series to the end, and he wasn't even a clone.