It Includes 4 new maps Blood River (1v1) Barrens (1v1) Memorial Basin (2v2) and Glacial Ravine (3v3) and 4 new achievements
Unattributed Quote:
* Never Leave a Man Behind: Finish a game with 5000 net resources contributed to your teammates on Memorial Basin (15 points)
* Drain Cleaner: Kill 20 enemy squads with a continuous Covenant Leader Power on Memorial Basin (30 points)
* Killjoy: Disrupt 5 active Leader Powers in a single game on Blood River (25 points)
~from major nelsons blog
All look easy
Heres two youtube links showing a rollover of all 4 maps
http://www.youtube.com/watch?v=LnMzdwnnT_o (longer)
http://www.youtube.com/watch?v=2klqvF_KRNg (more understandable)
Summery:
Barrens is basically a straight narrow path winding from player 1's starting base to player 2
Memorial Basin Is an extremely small square like map with a few extra bases on the sides
Blood River Is a square map with a (you guessed it) river going through the center with two (one land one energy) bridges going over it.
Glacial Ravine has the same base spawns as frozen valley with the difference that there is only one path for land units across the center of the map. This section also has two energy gates that cover it when used
Glacial Ravine Gameplay-http://www.youtube.com/watch?v=C0lq48EMgxk&feature=related
Personally,I think Ill pick this up eventually. No rush though