Portal: Unity is a mod for the Valve game "portal" with almost everything revamped. New story levels, New textures, redesigned portals, new protagonist, new antagonist and much more. !!PLEASE NOTE!!: You need to download the steampipe patch for it to work with the new SteamPipe system steam uses. To download this just go to the 'Downloads' section on the moddb page. (It's also recommended that you download the lazer fix patch as that fixes a critical end game bug) Instructions on how to install the patches are included with the corresponding patch.
While voice acting is decent and textures are quite good, the actual puzzles seem uninspired. The new mechanics that are introduced are not very well used, and the later levels aren't as difficult as they should be. A good attempt, but I think this mod could really be improved.