Delta Quadrant is a 4 player map released with the StarCraft II Launch. It is intended for 1v1 or FFA play and was in the Blizzard ladder during seasons 1 and 2.
Official Map Description
Two natural expansions are available. One is hidden behind your base, but a rock must be destroyed for optimal resource harvesting. The other expansion is located on the main attack path but available immediately. Choose your first expansion wisely!
Delta Quadrant is one of the few SC2 competitive maps that has a back door expansion. This allows for turtle-heavy styles that are impossible on most maps. The main vulnerability of the back door expansion is its vulnerability to drops. It has a very wide edge circumference, and also has a ledge above it on which you can drop units.
- Protoss players can warp in units into the back door expansion by placing a pylon at the edge behind the vespene geyser of the natural expansion.
Despite the very large number of expansion locations on Delta Quadrant, there are rocks blocking most of them. This, combined with the very short rush distances, makes the map generally unsuitable for macro games.
- Delta Quadrant is characterized by rotational symmetry. The natural expansion of Player 1, spawning at the 10 o'clock position, is more susceptible to attacks than the natural of Player 2, spawning at the 2 o'clock position. For this reason, Delta Quadrant is rarely used in tournament play.
The show Star Trek: Voyager was about a Starfleet ship lost in the Delta Quadrant.