This map is unique in Left 4 Dead because it is the only map where the main strategy involves sniping with the hunting rifle. If the snipers are strong players, they are able to kill many of the special infected and severely damage the tanks from a distance.

1 player on the roof near the middle trailer, using shotgun (A)
1 player behind that player, using shotgun (B)
1 player sniping, guarding the lift (C)
1 player sniping, guarding the ladder (D)

The two shotgunners will be dealing with most of the horde using pistols. If you keep your back against the wall you can avoid getting smoked constantly, however, it is the job of the snipers to be keeping the smokers and other special infected off of the shotgunners. It's better at times for the shotgunners to be standing instead of crouching because the commons can be spread out so you want to be less accurate, and also so you can be ready to dodge rocks or to move fast if something drops from above (hunters, boomers, commons, and even tanks). It's important for these 2 players to try to conserve shotgun ammo so that's why they use pistols on everything and shotgun on tanks. However, you want to avoid taking damage from CI as much as you can, so if you get surrounded then use your shotgun to clear the horde around you. It's very important for these 2 players to know how to dodge rocks and also for them to dodge in the same direction as the tank could be aiming at either one of them.

The 2 snipers will be killing most of the specials and they'll also be chipping tanks in the distance, so by the time they reach the shotgunners they should be almost dead. They use their hunting rifles the whole time since they are closer to the ammo pile. Snipers are responsible for calling out where the tanks are. 

Tanks can be on the left by the gas station, in/by the garage, at the white truck on the left by the garage, at the burger tank, at the fence across the map, above the shotgunners, middle/far trailer, or at the top of the tall building where the pill cabinet is. It's important for them to say where the tank is and when it's climbing so the shotgunners know to be ready. Sometimes, though, shotgunners will feel a lot of shaking and they should ask the snipers if the tank is above or below them if they haven't called the tank out. Shotgunners can feel shaking if a tank is above them before snipers can see the tank above them, so communication is crucial. When tanks are climbing the ladder, 1 shotgunner helps the snipers kill it while the other shotgunner tries to clear the commons.

- Communication is important for this strategy, especially when tanks are coming from two sides or tanks are dropping from the roof.

- Shotgunners use pistols and shotguns to control the majority of the common infected. The snipers do not pay attention to any common infected and focus on sniping the special infected and tanks.

- The gas station should be kept intact; avoid shooting it and blowing it up. Unfortunately, stray bullets always seem to occur!

- Two variations for the shotgunners have been tried: the first is to use the shotgun as much as possible to clear horde and go for ammo runs frequently. The other is opposite; try to use pistols as much as possible to clear the horde (with a little more difficulty), and go for ammo runs infrequently. The latter strategy seems to work to best because one can choose the ammo runs when there is a lull in the action, rather than forcing frequent ammo runs.

- Dodging rocks is key to achieving high times. The shotgunners should not be stationary, since this will leave them open to get hit by long-range rocks.

- Try to keep the gas station intact (if you have good snipers you never need to blow it up) but accidents happen. It's not that big of a deal but the debris can make it difficult to see tanks on the left. The gas station could also have something to do with more tanks coming from the left (unverified).

- At some point after you use the 8 kits you get, you can make a run for the pill cabinet and get 4 items that are either kits or pills, hopefully kits. You want to save your pills for the cabinet run so you're not slow. The snipers should grab shotguns before the run as well.

- Specials get stuck on this map after a certain period of time and in some parts of the map that are impossible to get to. You can usually get them unstuck by running across the map a little bit.

Additional note: ladder blocking

This strategy involves one of the snipers guarding over the ladder where common, special infected, and tanks may climb. The player can either stand over the ladder (ladder blocking), or melee/shoot zombies as they reach the top of the ladder. Blocking specials and tanks is ineffective because there's a good chance they will push the player off the ladder to injure her. In the past there has been some debate whether ladder blocking should be allowed on this map or not.

It should be pointed out firstly that it makes almost no difference in terms of the difficulty and implementation of the strategy. Ladder blocking is a game mechanic that is in both Left 4 Dead 1 and 2. It is caused from the fact that common infected will be killed when survivors land ontop of them.

by GuyGuy