
Note that this hack also works with Episode 1 and Episode 2. You may need to input upgrade_portalgun to enable you to fire both portals. Give yourself all weapons (including the Portal Gun) by entering impulse 101.

Drop the developer console with ‘~’ (you may need to enable it under your keyboard options or enable it via the -console command switch on the executable's shortcut). Repeat the above step with the scenes folder via GCFScape.

This merges Half-life 2 maps with the Portal map folder. Steamsteamappsthe_great_bundiniportalportal. Right mouse click maps and select the command Extract to place all the contents of the maps folder into the directory. Click the hl2 folder on the left pane of the GCFScape Explorer window. Open the file half-life 2 content.gcf via GCFScape. Steamsteamapps for all the available GCF archives available. This program allows you to access the cached game files for games using the Source engine.
HALF LIFE SOURCE CONSOLE COMMANDS INSTALL
Download and install GCFScape if you do not have it already.If you make a mistake during this hack, you may need to re-download Portal through Steam (or at worse, Half-life 2 through Steam). Unless you changed the install path, the directory is in.

