Nightmare is a 4-player map for StarCraft II. The closest expansion is a rich mineral location. A natural expansion is located further away but much easier to defend. One's strategy should vary depending on the location of one's relative opponent(s).
The central expansion can be accessed only by air.
It's the only multiplayer map set in New Folsom.
Blizzard Entertainment. StarCraft II. (Activision Blizzard) Map: Nightmare (in English). 2010.