This match up represents some of the greats in the interactive story-telling… puzzle and problem solving games. The objective is to solve puzzles though quests and clues to help the main character reach the end of the game. While Zork (you are in a hallway) was completely dependent on text-based play… Portal did improve on the form with a (less than stellar) GUI.
There will be bonus points awarded for the first person who can remember the late 80s movie that featured Zork.