I have heard through the grapevines that there is a secret Half-Life 2D game that was released back before Half-Life 2 was officially available, that can still be installed onto Steam by entering "steam://install/92" into your steam client.
However, I can't seem to make Steam accept this url - when I try to enter it as written, it just bounces me back to the cure and I can't figure out how to get this game in any other way.
How do I install Half-Life 2D?