actually Activision's portal was an amazing experience because yes it's a novel but you're the main character. You're an astronaut that arrived on Earth 100 years after you left and no one is on Earth. You find a single working computer terminal. The "game" is your terminal for you to use to figure out what happened. it's pre websites so looks like 80s ideas of info but I loved it

Sorry, I didn't make that clear: Activision got to the name first. I enjoy both Portals. :)