180 Files: The Aegis Project by Karelia Hall 2020 (1 rating)

1893: A World's Fair Mystery by Peter Nepstad 2002 (18 ratings)

1915 by Gregor Duddy, Luke Powell, Finlay Macpherson 2019 (1 rating)

1917: Lenin in October, by Sergey Gusev (1994)

1942 Mission by Tom D. Frost 1984

1958: Dancing With Fear by Victor Ojuel 2017 (29 ratings)

1981, by Anonymous (2001)
(29 ratings)

1982, by Zach Samuels (as Iblis Snowsdottir) (2014)
(6 ratings)

1K Cupid by Elizabeth Smyth 2018 (3 ratings)

1st of April Joke, by Baxsoft, Wrecker, Satsoft, Urri, Alexander Nikiforov (1997)

20 Strokes by PaperBlurt 2014 (11 ratings)

20.000 Meilen unter dem Meer, by Oliver Luschnath (1988)

20020 by Jon Bois 2020

2003: A Space Oddity by Chris Fayers 1984

2010: The Text Adventure, by Michael Price, B. Dennis Sustare (1985)

2044: Space Troopers, by Angus R. McLaren (1994)
(2 ratings)

20something by Jake Tucker 2016

21 Points, by Anonymous (2003)
(3 ratings)

2112, by George K. Algire (2001)
(2 ratings)

2112 by Anonymous 1980 (3 ratings)