Here you can download Portal | Underground Story To install, follow the Install steps.
Portal | Underground Story Download
To install, follow these steps:
First, if you already have installed the MTN Portal Story | Part One,
delete the MTN_portal_story folder in the Maps subfolder in your Portal directory.
After that, continue with the following:
1. Open the portal_underground_story compressed file with WinRar.
2. Extract everything from the Maps folder to your Portal directory.
3. Load up Portal, the story will be in the Bonus Maps, named "Portal Underground Story"
4. Play through the maps, the level will change as you get to a certain point. The puzzles get harder as you move on.
5. Once you have completed all the maps and have seen the ending, the game will return to the main menu.
6. If you have encountered any bugs or want to give feedback, feel free to send an e-mail.
OBS: There is a bug when you changelevel from map "MTN_chamber_04_1"
If you are going to edit my creation / use for advertisement or add into it; you must give me credit and ask for my permission.
If you are going to make videos / movies of these maps (e.g. make a speed run / play through of the map) feel free but if you are using it in a trailer of some sort, again, please ask for permission and give credit to me for the map.
Please give me some feedback!