'''Unstable client (awesome version)''' : This is a "pre-release" system, where client code changes can be made available for final review and testing. As a rule, new client changes will be seen here first. (This does not apply to server changes, as both the Normal and Unstable clients are talking to the same server code.) Any bugs here may not be fixed quickly, as this is not a fully "supported" system, and if you run into trouble with it you should fall back to using the normal client. Many players use this client as it has newer content (e.g. new models) and possibly more bug fixes. :Optional '''Experimental pack''' : Using the Unstable client allows the use of the Experimental pack which holds new or modified graphic models.