Trinity

As the game begins, the player's character is spending a final day of a London vacation in the Kensington Gardens. The evening flight back to the United States is looking increasingly unlikely for a number of unusual reasons. Hordes of nannies are blocking all exits from the Gardens, and the grass actively resists efforts to be walked upon. Worst of all, a gleam on the horizon soon heralds the unwelcome arrival of a Soviet nuclear missile.

Time begins to slow as the missile approaches, and with some ingenuity the player's character finds an incongruous door hovering in mid-air. There's no telling where it may lead, but it cannot possibly be worse than the alternative of being at ground zero of a nuclear detonation...

Brian Moriarty created Trinity's story in 1983. After joining Infocom in 1984 he proposed it to the company, but management believed that it was too large for the z-machine at the time. After completing Wishbringer Moriarty began working on Trinity in May 1985, researching the history of nuclear weapons and visiting the Trinity site and Los Alamos, New Mexico. He attempted to make the game accurately depict the geography of New Mexico and Kensington Gardens.

Moriarty completed the game in June 1986, and later stated that "writing it wasn't a pleasant experience, I can tell you that. It's not easy to sit down and write that stuff ... It was hard to live with that game for a year". He added, however, that "Trinity is not a funeral, and [don't] be afraid of it.

In 1996, Next Generation listed Trinity at number 100 in their "Top 100 Games of All Time", commenting that "Trinity takes the same types of serious themes of A Mind Forever Voyaging, and adds to them a heavy dose of mythology and fantasy. ... this is not only one of the most socially and politically powerful game experiences ever created, but also a landscape upon which puzzles of trademark Infocom quality can appear." Later the same year, Computer Gaming World listed Trinity at #120 among their top 150 best games of all time. The editors called it "a tense, ethical tightrope walk through the Cold War".

Trinity was included as one of the titles in the 2010 book 1001 Video Games You Must Play Before You Die.

Video game designer and programmer Jonathan Blow mentioned Trinity as one of his formative influences