Note: This branch is under development, and these instructions may fall out of date. They were accurate as of August 5, 2013. Should you encounter this, join #habitrpg on IRC (Freenode) and talk to litenull.

The general steps are:

Set up and run the server
Clone the repo
Install all dependencies
Run the client

Or, expressed in commands on the command line:

git clone --branch angular_rewrite git://github.com/lefnire/habitrpg habitrpg-angular
npm install
bower install (if you don't have bower, do npm install -g bower — might need sudo)
node server.js

To access the site, open http://localhost:3003 in your browser.