Simple yet efficient 317 source?

I’m looking to start a project with a base source that consists of the following:

  • properly organised, easy to wrap your head around, yet still efficient (Hyperion I guess?)
  • should at least have (and rather not much more than this): npcs, walking, running, equiping weapons, combat (albeit basic) and multiplayer
  • has to be 317 (since I have this weird fetish for the 317 client’s gameframe)

Thanks for any names, links or help!