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Ok so you start out outside of the base and adrenalin shoots through your body and the only thing going through your head is you do no want to die so you go to sign A and break the grav lift with your sticky granade that you have just picked up so you can open the gate at sign B. Next you tell every survivor left to get their butts in and if they are in or not you close the door by shooting the fusion coil. now since you made it threw that part you gota hid. and don't worry their are enough hiding spots for every body. Then your on your own. Best On "Close the Gates" Infection game type, good luck!!!!!!!!!!!!!!!
And Enjoy!!!!!!!!!!!!!!!

full credit goes to S0mestonedguy Please leave comments

The Map:http://www.bungie.net/forums/posts.aspx?h3fileid=32542078
The Game:http:http://www.bungie.net/forums/posts.aspx?h3fileid=32160025

Movie clips on how the gate works:
1 How to open it:http://www.bungie.net/forums/posts.aspx?h3fileid=32547809
2 How to close it:http://www.bungie.net/forums/posts.aspx?h3fileid=32548202
3 A secret place To the top of the Fort:http://www.bungie.net/forums/posts.aspx?h3fileid=32547699

front of fort

side of fort

The Gate Entry

Inside of Fort 1

Inside of Fort 2

Out side