Portal is a unique "interactive novel" that tells one of the best sci-fi stories ever. Returning from a failed 100-year voyage to earth, you find that that everyone has mysteriously disappered. Then you discover HOMER, a biological computer that alone holds the link to the past and conduit to the future. Together, you and HOMER must discover the doorway to humanity before you're stranded forever.
"Puzzles" (in the loosest sense) involve accessing various databases to uncover more information. Highly recommended, especially to sci-fi fans.
Review By HOTUD
English 
Comments and reviews
This came out in the Tandy 1000 era and, unfortunately, the devs didn't think to gate the gameplay in the event that better machines would be coming later. For DOSBox recommended is to use the absolute lowest setting, and I mean lower than 500 CPU Cycles.
what a piece of art.
dos era was full of imagination, creativity and innovation.
this game was amazing
Beat me to it, StillThere
I knew it! The cake was a lie!
No comment nor review for this game at the moment.