Love it! MCP apps is still new and under-utilised and we need to understand it's boundaries and compatibility.
chrisnager · 2026-04-28 19:42:46 UTC
For sure.
nsxwolf · 2026-04-28 19:27:35 UTC
I read this and I did not understand it. An MCP is synthesizing DOOM frames from a training set? What is this doing
nilslice · 2026-04-28 19:40:23 UTC
its basically an iframe embedding doom on a remote webpage
Ethee · 2026-04-28 19:41:46 UTC
It took me a reread and some thinking to realize what was going on. The 'MCP app' he's referring to here is basically a browser front-end replacement like electron. So what he's doing here is running DOOM as apart of that browser run-time and passing it through to the front-end. It's less "playing DOOM through the AI" and more "Playing DOOM while the AI can watch".
munchler · 2026-04-28 20:46:54 UTC
Thank you for this explanation. So the AI can respond based on the DOOM game that it’s watching? E.g. Could you ask the chatbot for advice on what to do next on the current game level?
alach11 · 2026-04-28 19:30:31 UTC
Snake and DOOM were two of our early tests (for filter functions and MCP) when we stood up Open WebUI for internal chat/agent use. Sometimes games are the best way to limit-test new tech.
chrisnager · 2026-04-28 19:36:50 UTC
That’s awesome. Yes!
awesome_dude · 2026-04-28 19:31:04 UTC
Best capability test there is
phodo · 2026-04-28 19:36:29 UTC
Great work. I wonder what the future "can it run doom ?" Will it be: Can it run AGI on a new quantum processor/ robot / bio-engineered cell. Or will it be Doom all the way down...
_pdp_ · 2026-04-28 19:38:15 UTC
Cool, but yes you can render whatever you want as long as you register an MCP resource and use it as part of a tool call. It is just html in an iframe.
avaer · 2026-04-28 19:45:33 UTC
The title is misleading. This is in ChatGPT but not on ChatGPT. It's not running on AI. It's running on a site that serves an AI chatbot.
Still very cool though.
I suppose most people don't know this, but you can render web resources into chat harnesses via MCP apps [1]. The actual DOOM part of this runs on [2].
i am increasingly going schizo, where every single thing I post/see posted gets copied and karma farmed on social media. further, any novelty I share with an llm gets eaten/absorbed by the harness as a feature.
gHA5 · 2026-04-28 20:59:00 UTC
Timestamp?
neosat · 2026-04-28 20:27:08 UTC
Apart from a cool project, this evolved my perspective on what an MCP is, along with some cool architecture insights and inspiring ideas. Thank you!
chrisnager · 2026-04-28 20:42:29 UTC
Glad to hear it! This stuff is fascinating and rapidly evolving. I’ve been learning by doing. Happy hacking.
throwawayk7h · 2026-04-28 20:27:46 UTC
Was a little disappointed that this didn't result in the agent playing Doom itself over MCP.
Still this is very cool! (And if that had been what you'd implemented, my disappointment would have been that it wasn't the reverse. :P Can it do both?)
firasd · 2026-04-28 20:55:26 UTC
Interesting experiment!
I think tool calling (such as MCP) is really underrated. People think of it as a way to connect to Google Drive etc but the potential for MCP to power actual in-chat apps is very under-explored.
I've been working on something called Liveclip which is like tables in chat: just a few hours ago I implemented a way for ChatGPT (etc) to surface sentences within the US Constitution: https://x.com/firasd/status/2049187034066198658
I've also thought that games are an obvious way to explore chat-native MCP apps. Hangman for example. Also small utilities like a clock. In fact I have a no-auth remote MCP clock that can be added to any client right now deployed straight from https://github.com/firasd/mcpclock to https://mcpclock.firasd.workers.dev/mcp <-- works in Claude .ai, Claude iOS, Claude Code, Codex, etc right now
Comments
Still very cool though.
I suppose most people don't know this, but you can render web resources into chat harnesses via MCP apps [1]. The actual DOOM part of this runs on [2].
[1] https://modelcontextprotocol.io/extensions/apps/overview [2] https://github.com/cloudflare/doom-wasm
Title changed from “DOOM runs in ChatGPT and Claude” to “A playable DOOM MCP app”.
i am increasingly going schizo, where every single thing I post/see posted gets copied and karma farmed on social media. further, any novelty I share with an llm gets eaten/absorbed by the harness as a feature.
Still this is very cool! (And if that had been what you'd implemented, my disappointment would have been that it wasn't the reverse. :P Can it do both?)
I think tool calling (such as MCP) is really underrated. People think of it as a way to connect to Google Drive etc but the potential for MCP to power actual in-chat apps is very under-explored.
I've been working on something called Liveclip which is like tables in chat: just a few hours ago I implemented a way for ChatGPT (etc) to surface sentences within the US Constitution: https://x.com/firasd/status/2049187034066198658
I've also thought that games are an obvious way to explore chat-native MCP apps. Hangman for example. Also small utilities like a clock. In fact I have a no-auth remote MCP clock that can be added to any client right now deployed straight from https://github.com/firasd/mcpclock to https://mcpclock.firasd.workers.dev/mcp <-- works in Claude .ai, Claude iOS, Claude Code, Codex, etc right now