Numerous pieces of artwork are unlocked simply from playing each level. Additional pieces can be purchased with XP from the Extras - Artwork menu.
Complete Chapter 6 Stage 4 to unlock the Vampire Wargame in the Extras menu. This interesting take on chess can be played solo against AI or with two human players.
Complete the game. Watch the credits at any time from the Extras Menu.
Complete the game on any difficulty and you’ll be able to play as Gabriel wearing a bandana or Old Snake’s ‘Solid Eye’. This does not change Gabriel’s character model to look like Snake, only adds the defined pieces of apparel.
Complete the game to unlock Paladin Difficulty. You may change the difficulty at any time from the configuration – difficulty option. Paladin difficulty makes enemies tougher and Gabriel weaker.