6502.org

Posted: **Sat Feb 07, 2026 7:43 am**

Hi All,
I stayed up way too lat finishing this, but I just wanted to share a project I was working on.
It started as me trying to figure out how to get the maximum "diamonds" to be able to "touch the ark" at the end of the game (Note: You can't)
but along with some other helpful partially complete source I was able to finish the whole thing.

You can find it at my repo here under the /src folder

https://github.com/joshuanwalker/Raiders2600

I also attached a copy here
Compiles using DASM
dasm.exe raiders.asm -sraiders.sym -T1 -Lraiders.lst -f3 -oraiders.bin

Have fun, let me know if you have any questions.

Posted: **Sat Feb 07, 2026 8:21 am**

That's great! Just for clarity, it's for Atari 2600, as you note in the repo:

Quote:

This repository contains the fully reverse-engineered and commented source code for the Atari 2600 classic, Raiders of the Lost Ark.

Unlike a raw disassembly, this project aims to provide a semantic understanding of the game logic. Variables, constants, and subroutines have been renamed and heavily commented to explain how the game works, from the procedural flute music to the complex collision logic in the Map Room.

Posted: **Sat Feb 07, 2026 5:58 pm**

Nice work!

Posted: **Sun Feb 08, 2026 2:04 am**

Thanks for sharing this.

I am always amazed at what the 2600 achieved with its limited RAM.

Posted: **Sun Feb 08, 2026 3:03 am**

I MASSIVELY updated the readme on the repo and also cleaned up some variable names

Posted: **Mon Feb 16, 2026 3:27 pm**

Very nice work indeed.

I'm still (very slowly) working on a disassembly of Space Invaders [PAL] for the 2600.

6502.org

Reverse Engineered Source Code for Raiders Of The Lost Ark

Reverse Engineered Source Code for Raiders Of The Lost Ark

Re: Reverse Engineered Source Code for Raiders Of The Lost A

Re: Reverse Engineered Source Code for Raiders Of The Lost A

Re: Reverse Engineered Source Code for Raiders Of The Lost A

Re: Reverse Engineered Source Code for Raiders Of The Lost A

Re: Reverse Engineered Source Code for Raiders Of The Lost A