I've written before that my first exposure to computers was a simple text-based "Lunar Lander" game.
Earlier this year I did some research and I found the original LUNAR source code, which is in the FOCAL programming language, and some translations to BASIC.
I decided I needed to port this to a modern programming language like C.
(Yes, that's intended ironically.)
The result is "LUNAR for C", which you can find on GitHub: kristopherjohnson/lunar-c.
I also decided to port it to Rust, which I was
exploring at the time. Porting to Rust was not straightforward, because the
original source code has goto-based
control flow, and Rust doesn't have a goto statement. One way to deal with
this is to implement a simple
state machine in Rust, and
the result of that experiment is available in a Gist:
lunar.rs.
But I also planned to do some machine-learning experiments to find the ideal
solution to the lunar-landing problem, so I created a very over-engineered
"LUNAR for Rust" version that is available on GitHub:
kristopherjohnson/lunar-rust.
If you want to play the game yourself, and you have a C compiler, I recommend building the C version.
Thank you to Jim Storer (the original author of LUNAR), to David H. Ahl (author of the BASIC ports), and to every other programmer who has created a lunar-landing game that I've played.