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

Code-10, by casper_nn (2003)
(1 rating)

"Incident! Aliens on the Teresten!" by Tarquin Segundo by Richard Goodness writing as The Water Supply writing as Tarquin Segundo 2020 (12 ratings)

+ = x by Chandler Groover 2018 (25 ratings)

13 Minutes of Light by Jod 2014 (4 ratings)

17776 by Jon Bois 2017 (1 rating)

18 Cadence, by Aaron A. Reed (2013)
(15 ratings)

20020 by Jon Bois 2020

2003: A Space Oddity by Chris Fayers 1984

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

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

The 3Games by Ema L. Bícová & Anna Michalcová 2016

43, by Jack Welch (2010)
(1 rating)

4x4 Galaxy by Agnieszka Trzaska 2020 (11 ratings)

500 Apocalypses by Phantom Williams 2016 (23 ratings)

Academic Pursuits (As Opposed To Regular Pursuits) by ruqiyah 2020 (24 ratings)

Across The Stars: The Ralckor Incident by Dark Star and Peter Mattsson 2007 (27 ratings)

Additional Tales from Castle Balderstone by Ryan Veeder 2019 (9 ratings)

Adventure in Time and Space, by Dorothy Millard (1989)
(2 ratings)

Adventure Quest by Mike Austin, Nick Austin, and Pete Austin 1983 (6 ratings)