Hypersomnia

Ensures perfectly synchronized gameplay across native clients (Windows, Linux, macOS) and web browsers, even with physics simulations, by transmitting only player inputs and using techniques like cache reinference.

Built with ImGui, it allows instant playtesting of work-in-progress maps with friends, including automatic map downloads for joining players, all within the same executable.

The game executable embeds the editor, game server, and masterserver, enabling easy self-hosting and community server lists without additional software.

A custom pool implementation provides contiguous storage, O(1) operations, and deterministic behavior crucial for networking and undo/redo in the editor, as detailed in the tech highlights.

Automatically downloads and verifies updates using developer public keys, with signatures verified via ssh-keygen, protecting against malicious builds.