Each player starts off in a fort section of the map, their main base protected behind a mineral field. Each base has a nearby expansion plot and natural defenses. Use of the Xel'Naga tower may just give you a hint as to what the other players are using to defend themselves.
Two gold expansions are up high and grant access to a pathway that can be used to take even a heavily defend base from behind.
This is my first map that I feel is good enough to upload, tell me what you think :)