[GH-ISSUE #53] [Request] Could there be a Universal Modder for Nuclear Throne? #16

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opened 2026-10-15 20:52:30 +00:00 by bsakaguchi · 4 comments
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Originally created by @ElTormakzXD on GitHub (Oct 5, 2026).
Original GitHub issue: https://github.com/rehan-remade/universal-modder/issues/53

A while ago, I wondered, "How could I use the Universal Modder?" And I remembered a game from my childhood: Nuclear Throne.

Would it be possible to integrate Among Us into Nuclear Throne? Or even Undertale? (Considering that Nuclear Throne and Undertale were created in GameMaker Studio, and that Nuclear Throne already has Nuclear Throne Together, which serves as a modloader for "mod.gml" files)

I'd like to experiment with this, but I don't know how.

Originally created by @ElTormakzXD on GitHub (Oct 5, 2026). Original GitHub issue: https://github.com/rehan-remade/universal-modder/issues/53 A while ago, I wondered, "How could I use the Universal Modder?" And I remembered a game from my childhood: *Nuclear Throne*. Would it be possible to integrate *Among Us* into *Nuclear Throne*? Or even *Undertale*? (Considering that Nuclear Throne and Undertale were created in GameMaker Studio, and that Nuclear Throne already has Nuclear Throne Together, which serves as a modloader for "mod.gml" files) I'd like to experiment with this, but I don't know how.
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@rehan-remade commented on GitHub (Oct 5, 2026):

Yes, no special version needed: point your agent at the game. Nuclear Throne is a GameMaker game, and the GameMaker playbook covers it. UndertaleModTool opens data.win (GML, sprites, rooms, sounds). For Nuclear Throne, Nuclear Throne Together's mod.gml mods are the friendlier route, since they need no patching.

  • Undertale in Nuclear Throne: both are GameMaker, so porting content works well. The agent can read Undertale's sprites and logic from your own copy with UndertaleModTool and rebuild a character or boss as an NTT mod. Keep the converted art on your machine; publish the mod code, not Undertale's files.
  • Among Us in Nuclear Throne: Among Us is a Unity game built around online play, so recreate its idea inside NTT (crewmates, an impostor mechanic) instead of hooking into it, with your own or fal-generated art.

To start: clone this repo, open your agent in it, and ask for one small thing first, like "add an Undertale boss to Nuclear Throne as an NTT mod". The mashup-mods skill covers this pattern.

<!-- gh-comment-id:5986300713 --> @rehan-remade commented on GitHub (Oct 5, 2026): Yes, no special version needed: point your agent at the game. Nuclear Throne is a GameMaker game, and the [GameMaker playbook](https://github.com/rehan-remade/universal-modder/blob/main/skills/mod-any-game/references/engines/misc-engines.md) covers it. UndertaleModTool opens `data.win` (GML, sprites, rooms, sounds). For Nuclear Throne, Nuclear Throne Together's `mod.gml` mods are the friendlier route, since they need no patching. - **Undertale in Nuclear Throne:** both are GameMaker, so porting content works well. The agent can read Undertale's sprites and logic from your own copy with UndertaleModTool and rebuild a character or boss as an NTT mod. Keep the converted art on your machine; publish the mod code, not Undertale's files. - **Among Us in Nuclear Throne:** Among Us is a Unity game built around online play, so recreate its idea inside NTT (crewmates, an impostor mechanic) instead of hooking into it, with your own or fal-generated art. To start: clone this repo, open your agent in it, and ask for one small thing first, like "add an Undertale boss to Nuclear Throne as an NTT mod". The [mashup-mods skill](https://github.com/rehan-remade/universal-modder/blob/main/skills/mashup-mods/SKILL.md) covers this pattern.
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@ElTormakzXD commented on GitHub (Oct 5, 2026):

Yes, no special version needed: point your agent at the game. Nuclear Throne is a GameMaker game, and the GameMaker playbook covers it. UndertaleModTool opens data.win (GML, sprites, rooms, sounds). For Nuclear Throne, Nuclear Throne Together's mod.gml mods are the friendlier route, since they need no patching.

  • Undertale in Nuclear Throne: both are GameMaker, so porting content works well. The agent can read Undertale's sprites and logic from your own copy with UndertaleModTool and rebuild a character or boss as an NTT mod. Keep the converted art on your machine; publish the mod code, not Undertale's files.
  • Among Us in Nuclear Throne: Among Us is a Unity game built around online play, so recreate its idea inside NTT (crewmates, an impostor mechanic) instead of hooking into it, with your own or fal-generated art.

To start: clone this repo, open your agent in it, and ask for one small thing first, like "add an Undertale boss to Nuclear Throne as an NTT mod". The mashup-mods skill covers this pattern.

Although I was referring more to the passthrough between the games mentioned xD

<!-- gh-comment-id:6000055351 --> @ElTormakzXD commented on GitHub (Oct 5, 2026): > Yes, no special version needed: point your agent at the game. Nuclear Throne is a GameMaker game, and the [GameMaker playbook](https://github.com/rehan-remade/universal-modder/blob/main/skills/mod-any-game/references/engines/misc-engines.md) covers it. UndertaleModTool opens `data.win` (GML, sprites, rooms, sounds). For Nuclear Throne, Nuclear Throne Together's `mod.gml` mods are the friendlier route, since they need no patching. > > * **Undertale in Nuclear Throne:** both are GameMaker, so porting content works well. The agent can read Undertale's sprites and logic from your own copy with UndertaleModTool and rebuild a character or boss as an NTT mod. Keep the converted art on your machine; publish the mod code, not Undertale's files. > * **Among Us in Nuclear Throne:** Among Us is a Unity game built around online play, so recreate its idea inside NTT (crewmates, an impostor mechanic) instead of hooking into it, with your own or fal-generated art. > > To start: clone this repo, open your agent in it, and ask for one small thing first, like "add an Undertale boss to Nuclear Throne as an NTT mod". The [mashup-mods skill](https://github.com/rehan-remade/universal-modder/blob/main/skills/mashup-mods/SKILL.md) covers this pattern. Although I was referring more to the passthrough between the games mentioned xD
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@rehan-remade commented on GitHub (Oct 5, 2026):

Ah, a passthrough: both games running at once, with one drawn into the other. That works best when the host is 3D and has a depth buffer to composite against, like Minecraft inside GTA V. Between two 2D GameMaker games, it's simpler and sturdier to port instead: rebuild Undertale's fights inside Nuclear Throne as an NTT mod. Pattern 5 in the mashup-mods skill ("the guest's rules as a simulation inside the host") covers that. Among Us is an online game, so a passthrough of its client is out; recreate its mechanics in NTT instead.

<!-- gh-comment-id:6004132769 --> @rehan-remade commented on GitHub (Oct 5, 2026): Ah, a passthrough: both games running at once, with one drawn into the other. That works best when the host is 3D and has a depth buffer to composite against, like Minecraft inside GTA V. Between two 2D GameMaker games, it's simpler and sturdier to port instead: rebuild Undertale's fights inside Nuclear Throne as an NTT mod. Pattern 5 in the [mashup-mods skill](https://github.com/rehan-remade/universal-modder/blob/main/skills/mashup-mods/SKILL.md) ("the guest's rules as a simulation inside the host") covers that. Among Us is an online game, so a passthrough of its client is out; recreate its mechanics in NTT instead.
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@rehan-remade commented on GitHub (Oct 10, 2026):

Closing, since this has been answered above. If you get stuck trying it, open a new issue with the game, what you tried and the last error.

<!-- gh-comment-id:6094555909 --> @rehan-remade commented on GitHub (Oct 10, 2026): Closing, since this has been answered above. If you get stuck trying it, open a new issue with the game, what you tried and the last error.
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