Havok Physics is a physics engine developed by Irish company Havok, used, among others, by Fallout 3 and Fallout: New Vegas. It is designed for computer and video games by allowing interaction between objects or other characters in real-time and by giving objects physics-based qualities in three dimensions. By using dynamical simulation, Havok allows for more lifelike worlds and animation, such as ragdoll physics or intelligence in massive falling objects. The company has also released a Havok Animation. Havok was purchased by Intel in 2007. On October 2, 2015, Microsoft announced it had acquired Havok.

During the development of Fallout: New Vegas, Obsidian Entertainment had to upgrade from an older version of Havok physics to meet compliance, which Joshua Sawyer stated was one of the biggest technical issues during development, as it was a very disruptive and resource-intensive process.[1]

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  1. Fallout: New Vegas 10th Anniversary Charity Stream (reference starts at 4:39:50)
    Joshua Sawyer: "'What was the biggest technical or engine limitation you had to deal with?' Um... I've said before the split memory pool is a big deal. Also, upgrading Havok physics was a big deal. We had to upgrade from a very old version of Havok physics to meet compliance, and it very disruptive and it took a lot of programming resources. There were a lot of technical reasons for it, but yeah."
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