I'm thinking of integrating a Fallout I and II style world map. The only things I think I would need to be able to do are, make locations hidden until stumbled across and some way to make random encounters e.g. randomly placing and/or randomly moving sprites that are also hidden until stumbled upon that also represent locations... and some way of entering the new location... maybe similar to the portal system but with a menu. Is this possible without adding code to the engine? Basically is there a way, using data files, to make invisabale and random sprites or objects that appear when collided with, and is it possible to configure a map selector that will put you anywhere on the nested map represented by the location sprite/object on the "world map."

Thank you
-Jonathan