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Show HN: I reverse-engineered the world maps of Test Drive III (1990 DOS game)

73 points3 daysgithub.com
ggambetta3 hours ago

I'm very happy to see this! Not so much because of TDIII (which I played, although not nearly as much as Stunts), but because there seems to be some momentum building around recreating old games using AI agents, and I love that! I had explored some related ideas [0] but throwing Claude at the problem seems super promising. The recent Crimsonland thing [1] was great!

[0] https://www.gabrielgambetta.com/remakes.html

[1] https://banteg.xyz/posts/crimsonland/

noufalibrahim2 hours ago

This is an interesting area. I've felt that with AI, it would be nice to have a project that I work on "by hand" so that my general skills don't atrophy and I've been writing an implementation of the Kyra engine used by old DOS games like Eye of the Beholder. It's mostly well documented and there are full fledged implementations (like with ScummVM) so this is just exercise for me.

I wrote a decoder for the CPS file format they use for sprites and it worked file for all images except one. It rendered half the image properly and then scrambled the rest. I could see that the sprite information was there but there was some offset problem. I had claude dig into it in detail along and gave it the ScummVM source for reference. I also gave it Ghidra so that it could debug the actual EOB.EXE file but nothing we tried got it to render properly. Even SSI's own code which got from a modding wiki failed to render this image. My final conclusion was that it was a half done asset that somehow found its way into the asset archive and is never used in the game but that's a flaky conclusion given that its name is referenced in the EXE.

I've been having a lot of fun upscaling the sprites used for the cutscenes and remixing the music using AI. It's a game I played a lot as a kid so being able to tinker with it at a low level is a nice distraction.

It's purely a "fun" side project without deadlines or anything so I get to do what I want with it without any hassles about "being productive".

sedatk5 hours ago

I used to play the demo of Test Drive III. It only had one map I believe. But I loved that it was a sandbox, so you could drive anywhere. I specifically remember following along the railroad. It was way ahead of its time back then.

mikestorrent5 hours ago

Between this and Stunts 4d https://en.wikipedia.org/wiki/Stunts_(video_game) what more could a kid ask for

472828472 hours ago

Time for a modernized port true to the original! I also liked the TrackMania series but I wish there was something reduced to the amazing essence of Stunts.

warpspin3 hours ago

I'd ask for Rock n' Roll Racing!

tdrgabi5 hours ago

Carmageddon would be what a kid could ask

Cthulhu_3 hours ago

I wonder / doubt it or something like it would shock anyone as much as it seemed to back then.

verve_rat4 hours ago

Oh wow, that's a game I haven't thought about in forever. Thanks for reminding me.

mrighele4 hours ago

I remember a map where just at the start, you could turn around, jump over an open bridge and finish it in less than a minute.

On the other hand most maps have loops and I would regularly get lost, unable to finish it...

mikestorrent5 hours ago

I can hear the PC Speaker music in my head.... oh man! it was actually available in adlib! https://www.youtube.com/watch?v=ayInv3ZZRak

nntlol4 hours ago

I always love any reverse engineered projects

tdalaa4 hours ago

Ah, that's so lovely! Will definitely try this!

snthpy5 hours ago

I used to play an Amiga 500 version of this. I think it was Test Drive 2 though.

bzzzt3 hours ago

Test Drive 2 (and 1) used a pseudo-3D renderer with scaled sprites (see https://www.mobygames.com/game/2107/the-duel-test-drive-ii/s...) TD3 used a 'real' 3D engine, but as a result it needed a beefy machine for the day. Driving felt a lot slower too, I never found it as much fun as TD2.

Asfand30992 hours ago

[flagged]

moviepiq3 hours ago

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