Rubikon

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Rubikon mascot used in Sergiy Migdalskiy Debugging Techniques.pdf

Rubikon is Valve's custom physics engine used in Source 2. It replaces Havok, which is the main provider of physics for Source engine games.

Forks

A heavily modified version of Source 2, called S&box, uses modified version of Rubikon physics engine called "Box3D", which was designed to be constantly updated.^[1]

Media

• About Rubikon Development — Sergiy Migdalskiy Debugging Techniques.pdf ( Archived version )

References

References
1. gvarados (@gvarados) (August 3, 2024). "S&box has a new Physics Engine".  X (Twitter).. Retrieved on September 12, 2025.