The Swamp

"This swamp is gonna mess up my white suit!"

- Nick "Time to get wet"

- Ellis

The Swamp is the second chapter of the campaign Swamp Fever in Left 4 Dead 2.

It begins in a drainage culvert beneath a rail track causeway that has been fashioned into a safe room. The Survivors must navigate a series of knee-deep swamps or bayous intersected with patches of dryer ground and indicative pathways made up of planks resting over the water.

By following the planks, players encounter the ruins of a long-abandoned boathouse and a jetty which yield various supplies. A nearby plume of smoke above the trees brings them to an expanse of bayou in the center of which is a crashed civilian jet airliner. On the way to the plane, a dead military paratrooper will be found draped in a tree and will often give up a Tier 2 weapon, often as well as a throwable item.

It is necessary for players to enter the aircraft's fuselage. Supplies will also be found here including Tier 2 weaponry.

The starboard side emergency door must be opened and this will trigger a Crescendo Event. Infected will horde from both sides of the fuselage. The starboard doorway forms a choke point and a single player can hold this position with relative ease. Defending the port side is more difficult, and in a co-op game, at least two (even three) players should be allocated this duty.

Once they have weathered the hordes of the Infected at the aircraft, players make their way through some ravaged old shacks and into the next safe-house.

Strategy
Also see: Tactics

All campaign walkthroughs are done on Normal Difficulty in single player, and are meant to give tips on what to do and generally point out things that might otherwise be missed.

There are, of course, a few key things to always remember: The swamp is a dangerous place. Can the Survivors handle it especially in a zombie apocalypse?
 * Stop, look, and listen.
 * Stopping to observe your surroundings might allow you to prepare for something nasty, like a Witch or Special Infected in a really bad place for them to be. Maybe even a Tank at possible times.
 * Teamwork.
 * This cannot be stressed enough. Left 4 Dead 2 is supposed to be a cooperative game. Communicate with your teammates, if you're playing with others, or if you're by yourself with the AI, point out things they might otherwise miss. In all cases, watch out for each other and take care of each other. You are not going to survive the zombie apocalypse by yourself.
 * Be ready for anything.
 * Don't panic.

Campaign
The Survivors start out in a train underpass filled with weapons, first-aid kits, and ammunition. Grab what you need, open the door, and venture into the zombie filled swamp water. Remember that the weapons are tier 1, so it is better to start from the last part to get a sniper rifle, ammo upgrades, grenade launcher, melee weapons, etc.

Shoot the zombies in this small section of swamp, then continue through the water or on the strip of land to the right until you reach a boat. Inside the boat may be some supplies, depending on what the AI Director places. There is usually an axe in the tree right next to the boat also. Continue forward and through the horde-infested swamp. Be careful, as this a a large area and it can be easy to be get lost as Survivors. There also tends to spawn a Witch most of the time, hidden somewhere in the swamp and is hard to see, so at least bots are needed or you should skip the Grenade Launcher if it spawned on the boat. Find a dead parachutist, and he usually has a Tier 2 weapon, grenades and temp. healing items. He spawns in two areas, so look carefully or you might miss on it. Go to the small shanty house and loot it's decent amount of items there, then go to the dock to restock, get new weapons and occasionaly Boomer Bile, Ammo upgrades and Magnums.

After stocking up on supplies at the dock, keep going up until you reach one of the small "swamp" verison of the porta-potty. Check it, as there is usually a Grenade Launcher, melee weapons and some other items. This also serves as a Rescue closet. Keep going, stopping at the times to pick up the weapons, grenades and occasional Pain Pills/Adrenaline shots that spawn on the way. Kill all the Infected around the airplane, even those on the other side of the plane. Look inside the plane and grab any intersting things if you want. There's usually some Gas cans and Propane tanks, and occasionaly an Ammo Upgrade. You have several options to hold the Infected off. Here are some of them:
 * Option 1: Players will backtrack to the dock and hold off all Infected waves that come at them. This is highly useful as no Infected will attack from your rear sides, and all fire can be directed at one point. This is also useful for the WING AND A PRAYER achievement if the player/s have not gotten it already. Once all waves are cleared, players will go on to the next section.

Once you get past the Crescendo event, keep going foward. A Tank might spawn here, so if it hasn't been alerted by any means yet, run to the plane as it has an advantage over you in the swamp water. Keep moving to another dock that contains a boat with a Tier 2 weapon. Go up, searching the house which acts as a "checkpoint" that contains a Grenade Launcher, Health kits, weapons and other items. There's also a Rescue Closet nearby the house should anyone died during the Crescendo. Search the firepit parallel to the house to find an extingushed fire, which also contains various items.
 * Option 2: Players will stay in the airplane and hold off all the Infected there. This is only used if the players have already collected the achievement or if they have melee weapons. The narrow entrences allow players to hack through the Infected lines, quickly disposing of them. However, there will be two fronts to defend which allows Infected to also deal damage. Chargers can charge the plane corridor, smashing everyone and stunning them, Smokers can constrict people from behind, and of course Spitters can spit on the plane and deal extremely large amounts of damage on you and your allies.

Go up, demolishing any Commons that try to stop you. Search the rubbled shack to find several Pipe Bombs or Molotovs. The water here is too deep for a Moltov to use, so some areas around the flooded house, if a Molotov is thrown, will be extinguished automatically. Look inside the house to find various items, grenades and the occasional Boomer Bile and Chainsaw. Keep going up, finding land, and it also is a spawn point for a Tank or Witch. If players have expended too much ammo, the small vehicle contains various Tier 2 weaponry. Complete the chapter to continue to the next area.

The Survivors
Now that humans are controlling the Special Infected, things can only get harder. However, they can't spawn until you leave the safe room. That doesn't mean that you should let them have a good chance to find just the right spot, though! Hurry up and get your supplies, and get running!

Throughout the level, remember that you are playing against human players. They will not wait for you to come to them, and if they do, it's because they have an ambush location that could be deadly to you and your team. With this in mind, you need to keep moving. However, moving blindly could be your downfall―move quickly, but with caution. Also, under all circumstances, stick close to your team.

Remember that in Versus, your melee is limited so you cannot properly use corner melee-spamming tactics. However, having the entire team in one corner will be helpful as you can generally see the Special Infected and you'll be able to kill most of them before they reach you.

Remain vigilant for the Witch's cries. If you spot a Boomer not moving in the distance and staring you down while the Witch can be heard―don't shoot! If he moves away or towards you, then you can safely assume he's not concealing a Witch. Witches, although avoidable, can be the fatal blow to the Survivors especially if there are competent Special Infected lying in wait.

As with all levels, when you know you're near the safe room, make sure you are with your teammates before you make a dash for it. If you make a break for it alone, it is not unlikely that a Special Infected will be waiting for your arrival and possibly kill you before the others can reach you. No one can survive the infection alone. Teamwork is essential.

The Infected
Boomers: This level was made for you. You are the sneaky one, hiding around trees and in bushes. There are many ambush locations that the Survivors must pass through to complete their journey. Concealed behind trees, bushes, shacks, and even outhouses, The Swamp should be a perfect environment for you. Beware of Bots, due to the fact they can see you through foliage. If a Tank shows up, do your best to cover as many Survivors as you can. A horde and a Tank at one time is often enough to overwhelm the Survivors. If you can cover the Survivors while other Infected are in position, you can use the opportunity you created to put the hurt on the Survivors. There's a Witch? Conceal her! Odds are that one genius Survivor is going to shoot you and the Witch in one go.

Hunters: This level can be a little challenging for you, for there are not many high buildings you can climb for high pounces. One of the only ways you can get a high pounce is to to wall jump off a tree and land directly on a Survivor. As usual, go for the lone wolves that wander off. Hear a Witch? Set up near her, and wait for one foolish Survivor to shoot you, and hopefully the Witch. If you can't get there in time, and a Survivor tries to cr0wn the Witch, pounce on them! Work with your teammates, as usual. Attack in groups, because it is harder to kill three Infected at once instead of one. The swamp water can conceal you well enough, as the Hunter's clothing is same to the swamp water.

Chargers: Separate the Survivors! Are the Survivors in a line? Get aligned with the Survivors, move in, and charge! If you miss, hide behind any obstacle you can find. If any Survivors are low on health, sneak up behind them and give them a good punch. Don't be afraid to charge, any charge that separates the Survivors is a good charge. Try doing it on the crashed airliner, as the Survivors will be forced to save that victim, and it will be hard if they do not have a scoped weapon.

Smokers: The time to duel with the Survivors has returned. But unlike your Hunter, Boomer, Charger, Jockey, or Tank brethren, you do not charge in and attack. You do not fight in close quarters. No, you are certainly unique. You are the long-range attacker. Stick to the foliage-filled sections and split the group in times of chaos. Pull the one who is the farthest from his friends. Working with the Boomer, pull one of the four slimed Survivors or alternatively, pull a clean one and separate the group. Pulling the last Survivor to jump off the wing of the plane can cause some time, and even cause them to retrace their steps. Hide behind trees, protect your teammates, and work together! There are some spots where you can hide, such as the bushes to prevent them (execpt bots) from finding you.

Jockeys: The Swamp is a great level for you. Wait for one Survivor to journey slightly ahead, then jump! Bring them around trees and shacks to prevent getting shot off. Work with your teammates! If one of your teammates has a Survivor in their wrath, protect them! The swamp water will slow the Survivors down, so use it to your advantage. Crouch to cover yourself more and having a less chance of getting shot at.

Spitters: Always work with your teammates! You'll get more damage by spitting on a helpless Survivor than on a Survivor that can easily get out of your spit. If a Survivor is vomited on, wait for them to get caught up in the horde, and spit! If a Hunter, Smoker, Charger, or Jockey has a Survivor in their wrath, spit on them to deal some extra damage! The water is perfect to spit acid, though it will be seen easily unless they are in a Horde attack or stuck in one place.

Tanks: Tanks are extremely useful during all parts (execpt the last one) of Swamp Fever. Their high damage output aganist the Survivors work extremely well. Always try to get them stuck in the water, as it makes them, regardless of their health (rather then the occasional Adrenaline) slower then you, and the water is useful to block off Molotov throwers. While on land, it is best to stalk them where you are able to see them (but they can't see you) to prevent your gauge from falling and once they reach water, slaughter them by punching them even deeper into the water to slow them down and let your allies pick them off quickly.