Portal? As in the really old one?
Why don't you play Narbacular Drop, then? It's the predecessor that is for free
http://theportalwiki.com/wiki/Narbacular_Drop
Or ASCII pOrtal
https://www.youtube.com/watch?v=MnvxDk2sAZg
Why don't you play Narbacular Drop, then? It's the predecessor that is for free
http://theportalwiki.com/wiki/Narbacular_Drop
Or ASCII pOrtal
https://www.youtube.com/watch?v=MnvxDk2sAZg