Follow our crystal clear walkthrough and helpful tricks to get you through the rough spots! Click the button to download full walkthrough.

* Insert the PORTAL KEY (F1) into the mechanism to activate it.

* Step through the portal.

* Take the eighth Beyond Object.

* Search the trash on the floor to find the LEVER (G1).

* Use the HAMMER (B1) to break the padlock on the door.

* Enter the Security Room.