http://www.bungie.net/Forums/posts.aspx?postID=26045181

Woo! This is about the One Millionth Infection map posted here, and about the One Hundred Thousandth in which the creator claims to have made a map that is different to usual infection maps! Yay! Hahaha!
Anyway. This is a recreation of an infection map that I made AGES ago. People used to love it back then, and from my experiences on this map, people continue to love it. I recreated this map using the unlimited budget glitch for Construct (couldn't find the thread with the maps in it for a while though =P). The map was part of a series of Infection maps that I made, and eventually I plan on remaking all of them and posting them as one bunch. Currently there are some older shit versions on my fileshare, but they kinda suck. =P

This map is construct with a number of bases to hide in, or around, all of which have weaknesses. Because of the proximity one of the bases, the humans almost always end up at the top in the middle just using the turret to cut down anything that comes at them, but if you go off with a few people the other bases are incredibly easy to hold down.

The map is built around a bit of a story outlined in the map description:When a recon team was sent to investigate a distress becon they had no choice but to dig in and wait for evac. ETA ten mins.

Okay, thats the origional version, no the current one. That one has a recon team instead of marine squad, but I removed it because it wouldn't let me upload bad words to my fileshare. Turns out that it was that it really wouldn't let me because i had "ETA" in my description. What the heck do they think it stands for? Here's what the description actually is - I think the original is better than the current one.When a marine squad was sent to investigate a distress becon they had to dig in and wait for evac. Arrival time: ten mins.Stupid Bungie/XBL ruining my map description

Because the map is built around the story there are quite few aesthetic objects placed.

Dig-in - the Gametype
The gametype is vaguely like Alpha Zombie, but with some changes to speed, and power. The Last Man Standing is more powerful, but by no means invincible, and covered in blood. The alpha zombie is black with a grav hammer, all other zombies are default zombie colour, with swords. The aim for Humans is to survive, the aim for the zombies should always be to help the alpha zombie.
Alpha zombie is stronger and faster, with a more powerful weapon, and immune to head shots, one swing with the hammer can kill loads of players. Normal zombies die fast, but there are lots.
The game is best played with 16 players as it forces people into other bases, but the game doesn't get to the best level of excitement until there are at least 3 other zombies.

Pictures
That first image was my first attempt at creating a panorama.

The base at the bottom of the map. Hard to defend, but contains the best protection. With a bit of team work you can hold this down for a whole round.

During the first wave of attackers the humans worked feverishly to repair this mongoose, and attempt to radio for evac.

The second base at the bottom, behind the bars. Originally this was where the infected were kept, but eventually people were forced to retreat inside behind the bars.

Behind the bars. Zombies can jump over the top, so be careful.

The other end of the "jail", guarded by a turret.

The depot. Fuel, Firepower, and a nice little hiding spot behind the boxes.

The front of the top base (where humans usually camp). The columns at the side help zombies approach without being completely slaughtered.

The inside of the base. Humans, stuck on this tiny ledge continued to radio for evac.

Up top, a lone human was in charge of keeping the radio towers intact.

Portal to the top of the base, push left or right to pick which side you want to pop out on. On the right of the portal is the portal control panel. Also seen is one on the mongoose used by someone cut down by an infected while fleeing.

Where the two portals pop out. Watch out for zombies following you or jumping from the other side. It takes three people to properly guard this spot, one this side, two on the other.

See the boxes and the radio towers? Lets just say the human who kept them standing wasn't doing a favour for anyone who goes through the teleporters. Jumpity jump.

Download Dig-in Alpha V2.
Download Dig-in gametype.

Im constantly working on this, so a V3 may come up sometime in the future, as well as Dig-in Bravo, Dig-in Charlie, Dig-in Delta, Dig-in Echo, and an altered gametype.