I saw sandbox and I checked it out, liked what I saw but wanted more. I want to make an RPG. I've been working with RPGMaker for a long time but it's only 2D, I want to make an extraordinary RPG, one that once I get bored with what it has I can change and manipulate to better suit my needs. If these RPG elements were added it would help tremendously then as it would now if there were some downloadable packs of more models, characters, music, etc. for more advanced models. Also, how do I make the area larger from the original map, as in more area to build on.

Heya. You might be more interested in the Cube 2 engine as it comes with an RPG built into it. I don't want to _link_ it in here though since it has non kid friendly content, but I'm sure you can find it. As far as increasing your map size, type /mapenlarge in the console to double the size of your map If you would like help with your actual RPG ideas and implementation feel free to add more details, and perhaps better yet stop into our dev IRC sometime. Take care.
-mike

first you have to consider what kind of elements.

1) NPC to P_layer_ chat
* This can be done to some extent, but the NPC are usually just stiffs with _script_ed GUIs, then again, so is most/all speech in other RPGs

2) NPCs that actively move about
* unfortunately ours is limited to stalking er... following the p_layer_

3) Picking up items!
* can already be done, works best when used with aliases, gets pretty complex in the _script_ing too though

4) events, triggers puzzles
* your imagination and the engine are the limits. if you can _script_ creative bits and pieces, exploiting the abilities of the engine, feel free to do so

so really you'll have to be very specific to what elements you want for us to guide you

btw, we're planning on releasing a music pack... eventually, models, textures and the like unfortunately have to come with the game, or it'll be a lot of effort on the user's side to set up