I've recently discovered that the source mod that I've compiled and released here is actually an earlier version of the game that Dead Dev Games have created. I am currently in contact with someone that claims to have the final version of Dead Dev Games' version of Portal, but I am unsure as to whether or not I should update it as v2.0 or create an entirely new v2.1.
Please let me know on how I should update the source mod. At the moment. I am waiting for my contact to get everything ready to send the final version of the game (which hopefully shouldn't take too long).
Until then, I'm still searching for more info on Dead Dev Games and the games they create. If anyone has any information about them, please let me know!