Plot: Seabase Delta is a text adventure game by Firebird released in 1986 for the Amstrad CPC, Commodore 64, and ZX Spectrum home computers. It is the sequel to Subsunk. Wikipedia
Plot: SuperTux is a free and open-source two-dimensional platform video game published under the GNU General Public License. The game was inspired by Nintendo's Super Mario Bros. series; instead of Mario, the hero in the game is Tux, the official mascot of the Linux kernel. Wikipedia
Plot: Kobyashi Naru is a 1987 adventure game by Mastertronic. The title comes from the Kobayashi Maru scenario in the Star Trek fictional universe, a training test. The player attempts to complete a series of challenges in order to complete the Kobyashi Naru test. Gameplay is standard for text-based adventures...