The rpg2 source looks good, but is it a multiuser framework or just a single-user game?

Hello,

Esenthel RPG 2 is a single player game (there's no multiplayer/networking code included).

If you are looking for some example of multiplayer networking, you can look into getting the source code for the Multiplayer Racing in the store under games. If you want an example for an MMO-style networking, you can get the Esenthel MMO source code or the more complicated/advanced Ineisis Online source code, both in the store as well.