Basically, it's a small city. You can *deep breath* do missions, join a triad, have gang wars, rob other players/shops/banks/triads, buy an apartment then furnish it, get in trouble with cops, buy augmentations/weapons/stuff and get more powerful, explore the city (main city (in 3 chunks), slums, abandoned slums and China town) and so on. The map is geographically huge and the mod brings a lot of new features to DXMP. In all, it's a new experience and pretty fun.
A misc shot of the map. The entrance at the base of the building at the back goes into the Chinatown market, which leads to the Red Arrow triad's club.
I'm glad it's dark and like the original game. Looks superb!