Only for XBO

original not 360)Unlock Alternate Ending
Clear "A Snake Tale" to unlock the M9. Then use it to stun all the Bosses instead of killing them to view an alternate ending.
Unlock: VR Characters
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Iroquois Pliskin: Complete 50% of the VR Training missions with Snake to play as this character in VR mode.
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MGS1 Snake: Complete 100% Tuxedo Snake in VR and MGS1 Snake will be unlocked.
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Naked Raiden: Complete 100% of Raiden's (Ninja) VR Missions.
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Ninja Raiden: Complete 50% of the VR Missions with Raiden.
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Raiden X: Complete all of the VR missions while playing as Raiden.
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Tuxedo Snake: Complete 100% of Pliskin's Missions In VR Mode.
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Jack.....................................