hi jap habe noch was gefunden vieleicht hilft es dir hier :)
Here is the list of things that can be unlocked and how to do so. I see a lot of topics asking whether something is an unlockable or asking how. So I am compiling it all here.
Very Hard and Revengeance difficulty settings:
These can be unlocked by completing hard and unlocking them as you go or by entering the Konami code at the title screen.
Up, up, down, down, left, right, left, right, circle, X, select start.
Pole Arm - Complete file R-01
Sai - Complete file R-03
Pincer Blades - Complete File R-04
High Frequency Murasama Blade (Sam's sword) - Beat the game on any difficulty
High Frequency Machete - Collect 10 data storage items.
Stun Blade - Collect all data storage items.
Armor Breaker - Collect all ID chips.
High Frequency Long Sword - Finish all VR missions with '1st' ranking.
High Frequency Wooden Sword - Find all Men-in-Boxes.
Mariachi Uniform - Complete file R-02
Custom Body (Red) - Complete 30% of the VR missions.
Custom Body (Blue) - Complete 50% of the VR missions.
Custom Body (Yellow) - Complete 100% of the VR missions.
Custom Body (Desperado) - Complete file R-04
Suit - Complete file R-00 on Very Hard
Standard body - Beat the game on Hard difficulty or higher.
Infinite Wig A - Complete the game on Normal or higher with at least 10 ID chips.
Infinite Wig B - Complete the game on Normal or higher with at least 20 ID chips.
Blade Mode Wig - Complete the game on Hard or higher with all 30 ID chips.
Gray Fox/Cyborg Ninja skin (Pre-order only)
Fox Blade (Pre-order only)
Metal Gear Solid 4 Raiden.
There are also three other DLC skins that came as pre-order bonuses but I cannot remember which belong to who specifically.