SUBJECT TO CHANGE:
Game is currently in Alpha (meaning it is playable, though EXPECT bugs (I will be/have opened some tickets of current known bugs as known on version 0.49))
Many details are not available at this time, the map is going through some growth and change and as a result details are not available at this time. Will update as to the current situation soon in an announcement here (the map was released Christmas Eve of 2014 A.D. (Eastern Time))
The big changes will occur either in 0.50 or 0.51 (depending on what ends up happening if fixing occurs while I am trying to get the changes to come online)
CURRENT DESCRIPTION (not found in-game, will update soon, WILL be updated for the 0.50 fix):
Play as terrans defending against and onslaught of units, and face extreme bosses in a very short amount of time. Build quick, build siege quickly, make sure you can detect, and hope you can defend against the onslaught of air late game. Currently 21 waves with a temporary final wave.