Use and Xbox 360 controller (compatible with PC) to enter the following codes from the Pause menu. Note that each code only works once per playthrough unless stated otherwise.
|+2 Nodes||Y, X, X, X, Y|
|+5 Nodes||Y, X, Y, X, X, Y, X, X, Y, X, X, Y|
|1,000 credits||X, X, X, Y, X.|
|2,000 credits||X, X, X, Y, Y|
|5,000 credits||X, X, X, Y, X, Y|
|Refill Oxygen (can be used multiple times)||X, X, Y, Y, Y|
|Refill Stasis and Kinesis energy (can be used multiple times)||X, Y, Y, X, Y|
So when you start the game just after you land on the Ishimura you can move the camera round and see his face. I don't know how long you can do this for but I did this about 2 seconds before he puts his mask on.