Entry location: Rock 24 Mod: Final Act
***NOTE: THIS CHEAT IS ONLY FOR THE ROCK 24 MOD FOR HALF-LIFE 2***
When you escape the Prison on the final act in Rock 24 (MOD), and you're on the final area where you fight the Strider, near the crane, inside one of the train cars, there is an ordinary supply crate. Or is it? Smash it open with one of your weapons, and inside there will be a bunch of PSP's you can pick up like any ordinary object. One of your fellow Rebel's will say somehting like: "Computer games ruin the mind. Well, except Half-Life 2. But PSP's are the real deal."