Alternately, you could drop through the maintenance shaft beyond if you enjoy a challenging jumping puzzle. Deus Ex Walkthrough - Deus Ex 844Įnter the code 4003 here and descend via the lift. Inside is this book with the maintenance lift code 4003. Use lockpicks or a LAM to break through that door ahead. Jock drops you off on the roof of this building in Paris. You can jump to nearby pages of the game using the links above.