I've been tinkering a bit with the engine, upgrading some components, and decided to backport the changes to Dead Hand. Changelog follows:

Full Patch Notes

• Switched from the venerable DirectSound API to XAudio2, upping the minimum requirements to Windows 10 as a result.
  
• Replaced the Lua 5.2 interpreter with LuaJIT, improving performance on low-end CPUs.
  
• Updated RecastNavigation library to the latest version.
  
• Pathfinding improvements.
  
• More robust actor snapping to ground algo.
  
• As usual, fixed a bunch of minor bugs and memory leaks.
  

Have fun!