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Re:Game Devs Explain the Tricks Involved with Letting You Pa... by klodolph on Sunday April 19, 2026 @08:41AM (#47823882)
> The system was deterministic enough that it could record your inputs/the game state and just play them back to get a gameplay video.

NOT how demos work in Quake. It’s more like Quake uses a client/server architecture, and the demo is a capture of the messages.

https://www.gamers.org/dEngine/quake/Qdem/dem-1.0.2.html

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