Open-source shooter which made it to AC: Valhalla and Skydio drones
So just for fun, I wrote a complete multiplayer game in pure C++. I even wrote my own texture atlas packer, which is now used by Assassin's Creed, 2 scientific publications as well as a drone manufacturing company - each of these basically mentions the name of my game. There is even a claim that Unity patented some of the ECS ideas that originate from this project. See https://github.com/TeamHypersomnia/Hypersomnia#tech-highligh... for details. By the way the game is pretty darn good. 10 people connected yesterday to test a new map:…
In plain words
Hypersomnia is an open-source multiplayer shooter written entirely in C++ by a single developer. The project includes a custom texture atlas packer that has been adopted by Assassin's Creed, Skydio drones, and academic research. Built from scratch over more than a decade, it demonstrates custom game engine architecture and has influenced Entity Component System design patterns in the industry. The game supports multiplayer testing with new maps in active development.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
So just for fun, I wrote a complete multiplayer game in pure C++. I even wrote my own texture atlas packer, which is now used by Assassin's Creed, 2 scientific publications as well as a drone manufacturing company - each of these basically mentions the name of my game. There is even a claim that Unity patented some of the ECS ideas that originate from this project. See https://github.com/TeamHypersomnia/Hypersomnia#tech-highligh... for details. By the way the game is pretty darn good. 10 people connected yesterday to test a new map: https://www.youtube.com/watch?v=CHLPzZqANlM It took me well over 10 years to code it all by hand, but the journey was truly worth it.
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