Aaaaah it's one 21k assembly file (including data in hex format). Step #1 for anyone trying to port this to another platform will be to split it up into smaller files, no doubt.

this is a great remake of the Load Runner follow up, Mad Monks Revenge. it works amazing on a modern macOS!

https://mmr.quarkrobot.com/

I love how well structured these old 8bit asm games always seem to be.

oh my, they used my favorite solution for the how to draw a circle interview question

For anyone curious, the draw a circle code in Circle.asm appears to use Bresenham's circle drawing algorithm.

https://www.geeksforgeeks.org/c/bresenhams-circle-drawing-al...

The secret is to draw 1 arc of a 45 degree angle and the reflect it (redraw it with different coordinates).

Just wanted to note: this is in no way the original source code for the game. It's disassembled and commented source code.

Here is the repository owner explaining the process himself: https://github.com/Piddewitt/C64-Game-Source-Code

Nice work and interesting still, but maybe we can correct the title?

This can't be the original source code.

https://github.com/Piddewitt/Loderunner/blob/main/Lode%20Run...

Original source, I imagine, would be very tersely commented, if only to fit in memory / floppy, and would have very short variable and subroutine names, and lots of mess and commented-out lines from experiments.

This looks like a very lovingly done disassembly.

I just went to a talk at Portland Retro Game Festival by the dutch guy that made an official Atari Lode Runner port. He said he found a japanese book that had the C source in it and got the enemy AI from that.

This is pretty cool.

I don't think I ever played an actual 'Lode Runner', just Steve Moraff's version (DOS shareware?)

Whatever happened to that guy?