One of the first programs I thought was really cool was the Zork text adventure game. The one I first saw was the Fortran version popular on DEC and Data General minicomputers.
A couple years later, it was split into three - Zork I, II and III - and made available on a variety of microcomputer platforms, including the Altair.
Jinx is my own little creation and follows in the Zork tradition, borrowing heavily from it in user-interface and "look and feel."
I wrote it originally to be compiled on an ANSI C compiler designed for use on 6502-based micros like the Apple II. But after getting into Altairs, I felt I just had to back-port it to the K&R-style BDS C compiler. Totally different bird.
But it's done and ready to run. Download a copy here:
The download is a ZIP archive with executable for various platforms, as well as documentation. The Altair program is in the Altair directory. Look at the PDF files to help you get started.
I haven't included the source code, because that would sort of spoil the game. Looking at the source is sort of like cheating. But if you want the source code, email me and I'll send it to you.