# BepuPhysics 2

6 Hacker News commenters recommended BepuPhysics 2 and 1 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months.

**Verdict:** A fast physics engine for C# game projects that people praise for its performance. Caveat: its design is hard to integrate, and it does not work in Unity.

## Why people recommend it

- C# design appeals to .NET developers (3 comments): "there were a lot of hardcore libs made for C# gamedev (BEPU physics is from that era" ([source](https://news.ycombinator.com/item?id=49895146)) "even their physics engine is C# which is insane in the best possible way" ([source](https://news.ycombinator.com/item?id=49894427)) "My favourite is probably Bepuphysics due to its C# nature" ([source](https://news.ycombinator.com/item?id=49057207))

## What people warn about

- Design is hard to integrate (1 comments): "Their design is difficult to integrate with but the performance is insane." ([source](https://news.ycombinator.com/item?id=46119084))
- Setup lacks sensible defaults (1 comments): "They could do with creating defaults for the narrow phase handler, buffer pool, threat dispatcher, etc." ([source](https://news.ycombinator.com/item?id=46126492))

## Alternatives hackers recommend

- [Box3D](https://hackerapproved.com/p/box3d.md): 14 recommend
- [Box2D](https://hackerapproved.com/p/box2d.md): 12 recommend
- [MuJoCo](https://hackerapproved.com/p/mujoco.md): 10 recommend
- [Jolt Physics](https://hackerapproved.com/p/jolt-physics.md): 9 recommend
- [Rapier physics engine](https://hackerapproved.com/p/rapier.md): 6 recommend

## Cite as

Hacker Approved, "BepuPhysics 2", https://hackerapproved.com/p/bepu-physics/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).