New Code

Trivia

 * The code 451 is a nod to the original System Shock (keypad combination for the door leading out of the Healing Suite), and is referenced in several other games including: Bioshock series (original, sequel, Infinite), Deus Ex series (original, Invisible War, Human Revolution, The Fall, Mankind Divided, GO), Thief, Sanitarium, Firewatch, Gone Home, The Novelist, Dishonored 1 and 2, and Prey (2017). The code itself was originally the entry combination to LookingGlass Technologies office (0451).
 * This code is actually used in an even older game, Another World from 1991. The protagonist, Lester, enters a code of 4511932 on the keypad to access a further part of his underground laboratory.