Steam – Is the free version of Portal identical to the paid version

portalsteam

Portal is currently free (through Sept 20th, 2011) to download with Steam. Are there any restrictions on the free version, or is it completely identical to the paid version? For example, does this count as owning a Source game for the purposes of mods that require you to have a game with the Source engine installed?

Best Answer

The last time Valve made Portal free, it was identical in every way save one: You couldn't get the Source SDK with the free version, which you need to play mods.

However, Valve used to give you the SDK when you purchased Team Fortress 2, which is now free to play, so that may have changed.