I was browsing through a book shop the other day and found a map of Oxford, as it was in 1899, which was interesting but I couldn't think of a justification to buy it. It got me thinking, could you use a map as the main mechanic for a roleplay game?
I'm not talking about battlemaps here, but something more unusual.
My initial thought was for something like Geomancy / playing with leylines, which I may develop further at some point, but I was wondering if anyone else could think of a good use for a 'map as a mechanic'?
P.S. I'm not thinking map creation during play, like Black Fire or some other games (including my entry for GC), but using a pre-bought map.
P.P.S. If this isn't a new idea I'd be interested in what other people have done too.