An incomplete and unreleased game by Stu Galley. Curiously, the game file "spy.zip" originally found in this directory was not Checkpoint at all, but an early version of Journey.
After finishing Seastalker, (Galley) had the idea to write a Cold War espionage thriller, tentatively called Checkpoint: "You, an innocent train traveler in a foreign country, get mixed up with spies and have to be as clever as they to survive." He struggled for six months with Checkpoint, almost as long as it took some Imps to create a complete game, before voluntarily shelving it: "The problem there was that the storyline wasn’t sufficiently well developed to make it really interesting. I guess I had a vision of a certain kind of atmosphere in the writing that was rather hard to bring off."
-- From "Moonmist", an article by Jimmy Maher (https://www.filfre.net/2015/03/moonmist/)
The working title was "Spy", and this was also the working title of Border Zone. Therefore it is often reported that Border Zone is a refashioning of Spy/Checkpoint, but Marc Blank's cold-war thriller game was written entirely separate.
Stu Galley turned his attention from this project to a game that would eventually become "Moonmist".
Infocom's trademark was abandoned in 2002, but the IP is stilled owned by Activision. This site exists for the preservation of abandonware.