to answer some questions,
This is the game I am using as a base for the project:
http://www.walmart.com/catalog/product.do?product_id=4183785
For now I am sure you would need to purchase it first then everything I am doing would be a free download. What I am making is called a "Mod". I the was a mod that I was watching for half-life2 that, recently decided that they where going to make it a stand-alone game and it would be available for $19.99 and the full game was not required but it still used the same engine. I don't know what doing something like that would require, or if I would have to have a publisher. I'll think that would be a good road to go down when the time comes. I'll do some more research on it, because I am not in this to make any money, but saving you people 20 bucks would be nice. The only other thing you would need is a graphics card that is Directx 9.0 compatible (for my textures to show up right) most newer computer (less that 1 year) have them, if not you can pick one up for $99-$150.
Also halflife2 is available for the X-box... I don't know if you can run mods on that, but that would be a cheap alternative too.
As for a "live": sinking, meaning walking around wile it is sinking in real time... I don't know yet, the game engine is really finicky about certain things. Mirrors for example, what you see in the shots may be as good as it gets. the engine just doesn't support that kind of thing. Slowly lowering and tilting the map may cause problems. For starters I am going to make progress on the ship itself. Once I have that all done I'll start looking it what more I can do with it. I sure would like to have a live sinking with computer people and everything, it would be cool.
I added water to the shots to make them more interesting, and to show what the graphics engine can do. I'll be adding water to lots of my previews, and when I am done, there will be something with water even if it can only be a staic tilt and water level.
as for multiplayer and averting disaster... I don't plan on that, tho multiplayer where you explore with a friend would be cool.
Stay tuned for more updates
-Kevin