Thanks, bluej, though link doesn't seem to work. Not a huge fan of D&D though... while it's done well, I think most modern systems have surpassed it.
Wow, looks like a long, yet concise outline. I'm in love with the technical systems prose already
Apparently there's a wiki too: http://rpg-design-patterns.speedykitty.com/doku.php/table_of_contents
Maybe I'll try and build an open source system later, first thing to do if I ever get back into game making
IMO, sounds like you're describing a Roguelike to me. Perhaps have a look into some rougelike games?
There are many RLs with the tile based detailed interaction simulations, even down to hunger -- or tiredness, not to mention standard things like weapon speed, movement costs, etc.
I don't think most of them really have the systems out in the open and need a bit of digging in to find. There are a few RLs with good systems to copy - Unreal World, Dwarf Fortress, URW, IVAN. But roguelikes are a great idea because they're almost purely prototypes with constantly added features, and one can easily see how well they work together.
I wonder if there's a RL where you can just swap in and out game mechanics to see how they do.