Prey walkthrough: 'First Day on the Job,' 'Break Out,' 'An Office with a View' and 'Everything You Know is About To Change' - Polygon
Prey - How to Open the Safe in the Simulation Debriefing Room and Gain Access to Yu's Office in Talos 1 | USgamer
Prey | All Safe Codes Guide - Gameranx
All The Prey Passwords And Keycodes - GameSpot
Prey: Every Security Code In The Game
Prey Passwords and Keycodes - All safe codes and door codes - Maintenance Tunnel, Hidden Treasure, Security Booth - Cheat Your Way to Success | USgamer
Prey - First Safe Code | AllGamers
Prey 2017 Security Safe & Door Lock Codes - Video Games Blogger