This page contains Cheats for Half-Life: Opposing Force organized by sections for PC. This game has "Action Shooter First-Person" as genre, made by Gearbox Software, released on Oct 31, 1999. If you can't find a hint or secret in our list, then please check this page periodically for the latest updates.
- Developer: Gearbox Software
- Publisher: Sierra Entertainment
- Genre: Action Shooter First-Person
- Release: Oct 31, 1999
- ESRB: Mature
Change Time Once you start the "WE ARE NOT ALONE" chapter of the game, go left to the door. If you open the door, you will see Gordan Freeman run into the portal that takes him to Xen. If you are fast enough, you can quickly run after him and jump into the same portal he goes into before it closes. If done correctly, you will be transport..From: Marcotheking