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An Outpost Attack (OA) is a scheduled attack to an outpost performed by the existing bestiary according to the outpost's location in the map.

Outpost Attack in 3D Version

There is now an outpost attack for the 3D version of Dead Frontier. A flashing "The Outpost is under attack!" message appears at the top of the outpost main screen and a siren is heard for the duration of the event on the outpost screen and anywhere within the block of the outpost.

You can protect the entrance and the guards will help you combat the zombies, but they will also take with them some of the precious EXP you need. That is why if you want more EXP, stick away from the guards. At the end of the attack, a notification on your screen informing you the attack is over and experience bonus you gained for participating is displayed. The more zombies you killed as well as the more active you were in the attack, are both factored in among other things to get your bonus experience.

There can be several Outpost Attacks during the day (2-5). The attacks to each outpost usually happens roughly at the same time. They can also happen after the new missions had been released every 12 hours. Outpost attacks can last anywhere between 15-75 minutes with most attacks lasting around 30 minutes.

There is an interval of 3-5 hours between two Outpost Attacks. One clue to the start of an Outpost attack is a sudden increase in aggro, generally about a minute before the attack starts. Another is the alarm bells ringing. It should be noted that in the Inner City, the Outpost Attack siren is apparently programmed to play directly over the in-game music. In other words, if you choose to have the game's music turned off in your Settings, you will NOT be able to hear the Outpost siren in the Inner City . In that case, you will have to rely on watching the aggro levels or look for a message inside the outpost that states the message " Outpost Attack" in order to know when an Outpost Attack has begun, is in progress, and when it has ended (of course, you'll know it's ended when the window showing your experience bonus opens).

OA bonus is based on the number of zombies that you've killed, regardless of quality. So in theory, killing 5

Wraiths will yield the same amount of bonus as killing 5 grey zombies, although killing 5 Wraiths is obviously more challenging and rewarding. Because of that, the more you kill the better your EXP bonus will be. It's best to switch to single player if you are trying to gain EXP. The Bonus is calculated by the number of zombies you killed or helped to kill, multiplied by a random integer from 2 to 50.

During the Outpost attack aggro will be at a maximum. A weapon with high DPS (Damage Per Second) is highly advised.

Also there is no certain way of knowing when and for how long Outpost Attacks will last.

Personal Outpost Attack

If you have made a PO ( Personal Outpost ) in any zone , and have not left it for a minimum of 2 days - then it will be swarmed by zombies in a version of a OA ( Outpost Attack ) . You will know there is a POA - if you are in Outpost mode because you will go to the Inner City ( even though you are on the trading page etc ) when you log in and there is a sign above saying " Outpost Is Under Attack ! " .

POA's are almost exactly the same as OA's , the only differences are that there are no Guards to help and there is no bonus exp when the POA is over .

Tactics ( Single-Player Outpost Attack )

If you want to save ammo and have a strong melee weapon, gather a large group of enemies but if you want to circle do it in large circles to avoid getting hit.
For weaker players, stay with the Guard behind the crates and stand your ground. He will weaken your enemies and this can be used to your advantage. The Guards will also take a sum of the exp if they kill a zombie near you.
Save/buy as much ammo as you can if you do not want to fight with melee and there are many zombies swarming you .
Chainsaws can be used even in Fort Pastor OA with success , you just need enough skill and remember to stay away from multiple tendrils ( because the tendril will swing , and the tendril behind her will push her and you will still get hit .... this wont happen if you have a strong chainsaw with high enough critical . ( watch this vid on how to do it -> DF Holding Fort in OA ( Part 2 )
Watch out for zombie swarms ... zombies might swarm you from all directions , so save up ammo for these occasions .
Do not go in a area with a small space to move around in because you will get swarmed sooner or later ( unless you are not near the entrance or if you have a MG or Auto-shotgun ) .
Do not go near buildings , many zombies will swarm and you will be hard-pressed to get out of the mob and get hit many times .
Go near the Guards if you want some help but dont want to lose exp . The Guards will damage other zombies and you can take them down easily .
Do not always stay inside a Outpost if you are in a OA ... the Guards will keep out weak zombies , but very strong zombies ( tendrils , spiders , bloats & brutes in FP and P-13 or bones and reapers in Dogg's Stockade ) can get past the gaurds and near you - and if you dont have much space to move around in , then you will get hit . ( especially during a Dogg's Stockade OA )
Watch out for spiders when using melee ( chainsaws ) Because they are extremely resistant to knockback even a Corpse Grinder ( strongest chainsaw ) with 124 crit wont stop a spider . ( Ironically they are easily knocked back by a shotgun compared to other zombies )
In single player there are less zombies , but they are all concentrating on you - so go in places where you have to fight only a few zombies at a time .

Tactics ( Multiplayer Outpost Attack )

Watch out ! There are many more zombies ( since there are many players ) .
MP OA is very hard since there are much more zombies , and some are invincible ( meaning if they are concentrating on Player A , you can hit them as much as you want and they wont die ... however once they switch their attention to you - the dmg take registers and they die instantly ( if you gave them enough dmg to kill them ) .

Tactics ( Single-Player Personal Outpost Attack )

Watch out ! There are many zombies , and you are in a enclosed space .
You are defending yourselves in a enclosed space , so it is wise to stay in a area where only a few zombies can enter at a time ( otherwise , unless you have a crowd control wep you will die )
There are no guards to help , you have to try your best ( use weapons that do the most damage in the least amount of time )
If you have less ammo or are low on health - leave . POA's are almost impossible to survive in , because you are fighting in a enclosed space and you dont have any help at all .
You need a very powerful weapon ( crowd control ) as a POA in the EZ ( meaning long-arms and tendrils spawn most commonly ) will be impossible even with sweeper .
If you are looking to grind however, it's best to hide behind a wall near the door, and use grenades to kill off the zombies, but make sure the zombies can't get around and reach you easily.

Outpost Attack in 2D Version (Removed)

Outpost Attack in 2D Version

Whilst Nastya's Holdout is very well defended and fortified, there comes a time when a massive horde of zombies will assault its seemingly impregnable territory, forcing all present Survivors to defend the Outpost or break along with the front lines.

They usually begin randomly at any 15 minute period between 9:00 P.M. - 1:00 A.M. UTC / GMT (5:00 P.M. - 9:00 P.M. Server Time) and last about 1 1/2 hours (90 minutes), but sometimes even as short as 30 minutes, depending on the amount of attacking zombies. A good website for finding when it starts for your timezone is, http://www.timezoneconverter.com.

Note: If you logout and login with a different account, all the bonus experience will be lost. Also, careful observers believe that the OA starting time is based on the average of the server load peak time during the last 3 - 7 days.

The Junk Yard Approach

Located along the Southern Edge of Nastya’s Outpost is the Junkyard-a treasure trove of spare parts for outpost engineers and mechanics. It’s also a security nightmare-it’s way too large to properly barricade, and the infected who pass by can easily approach our undefended flank-all that separates them from us is a chain link fence and whatever few guards we could spare from the main gate. If the infected break through, our guys in the rooftop and the front gate will find themselves surrounded on all sides…and Nastya’s will have a bloody massacre on its hands.

That’s where you come in. A few good survivors could enter the maze of twisted wrecks and bottleneck the infected to cut down on the numbers that do make it through. Make no mistake-this is grunt work. You’ll be well within the range of infected claws, so watch yourself. We trust you’ll fight with bravery, and if need be, sell your life dearly.

The junkyard approach is for close-quarter weapons like chainsaws and grenade launchers which get stuck into the carnage. This is the place where melee and chainsaw users shine, since they are not much use at the Main Gate or defending the Rooftops. A high Endurance, Critical Strike, and Agility helps out quite a bit, considering that the zombies will not only go after the exit, but after you and your partners as well. Recommended weapons include Shotguns, Machine Guns, Melee Weapons, Chainsaws, and Grenade Launchers. Pistols and rifles also work, but are not the best weapon. (This is biased. Rifles are very good for some people. It is very risky to be near a zed a lot, and inefficiency is rampant in how you fight and prevent zeds from getting to the outpost.) Zombies that players may find here are tough, based on the player's level. Those corpses cannot be looted, if you didn't already know.

Defend the Main Gate

The Main Gate is where all trigger happy survivors go to fight. Shotguns, Machine Guns and the few guys with the Grenade Launchers, sometimes even Pistols and some of our Marksmen can be found here. Melee Weapons are not as recommended yet still useful if one gets real close (using a pen knife isn't going to get you anywhere, FYI), and trying to use a non-ranged weapon at the main gate is considered foolish at best and leeching at worst by experienced defenders.

Luckily for the defenders here, they will not take any damage if they maintain a safe distance from the gate while the barricade stands proud and tall, since sometimes it is possible for zombies, particularly longarm zombies, to hit players who stand too close behind the gate. But beware and run if you do not manage to hold it; when the barricade falls, zombies rush inside and will go for the players. Running out of Ammo is the major concern here, as is reloading since you can rarely afford to even spend a second not shooting at the incoming horde. Making sure that you have a high ammunition capacity here is a tip that some players forget. If you run out of ammunition too quickly, you are likely to waste time that you could have spent blowing a fat zombie's brains out.

As you can see very well, this area can get really bloody, which could possibly make it hard to spot red zombies that are closing in, especially if the player's screen contrast/brightness settings aren't high.

Intercept from the Rooftops

Defending the Outpost's Rooftops is easy for some, but impossible for others, depending on their weapons and skill. To be of any use at all, you need a high accuracy skill, an accurate gun and a good bit of confidence that you'll manage to hold them off. Rifles and Pistols are ideal for thinning out the numbers of the undead horde with well-placed shots, provided you have the necessary proficiency in Accuracy; other weapons like Grenade Launchers or Machine-Guns will be better than nothing, but are still a very poor choice for such a defence. The running meatbags down there can't reach you at all, but due to the large gap of space between you and them, you'll need to be very accurate to hit anything at all. Given how far away you are from the zombies, melee is not an option; the best choice here is a high powered rifle or revolver. If you don't have a gun similar to that, then this might not be the right defence for you.

Your goal here is not to snipe down the whole horde that attacks us, but rather to shoot holes into the flood of infected which is rushing to our buddies at the Main Gate. Every zombie that gets past here, can assault our barricade at the gate, so better do what you can to prevent it from getting overrun. You'll need to stop them from getting past for 6 minutes, till the next set of our boys arrives, but if 10 or more get through then those guys at the gate are in real trouble. So grab your rifle, grenade launcher or whatever you have and get in position for some serious speed sniping.

The Rooftops make up our north eastern outpost defense line and are easily the toughest area to defend, if you're not ready for it. You'll need very high accuracy and a strong rifle or pistol to even make a difference. Make sure you've got high reload stats, as you don't have a second to waste as those zombies run past. Melee is completely useless, as you are above the zombies on the street. Because of that you can't get hurt, but ammo is still a problem here, as without working guns, you're not being of any help to fellow survivors on the rooftops who are trying to keep zombies at bay. A gun with a high ammo capacity and average or above reload speed is useful here. Ammunition will deplete very quickly if you have a low powered gun, so make sure it's power is high enough to dish out some serious damage on the stronger enemies that may resist the damage sustained at the main gate.

The Outpost Guards

The Outpost Guards are a loyal force of soldiers and mercenaries dedicated to guarding Nastya's Holdout and its citizens from all harm. When the Outpost Defense fails and the zombies break through the defensive lines, they bear the brunt of the casualties. They vary greatly in strength and weaponry, but the stronger ones usually volunteer to work with the more experienced survivors. Most use assault rifles or sniper rifles while the less experienced of our outpost guard use mostly pistols. The standard issue weapon for the best outpost guard is the AK 47 (JY, MG) or the M82A2 (RT).

They will assist you whenever you choose to defend an area in Single Player, but once an Outpost Guard is killed, you will be defending the area by yourself and won't get another one untill you return later and decide to help for a second time. So it's best to help them out of death traps so you'll at least have some covering-power while you're there.

NOTE: If you are over lv.45 the Outpost Guard will use a Ak-47 at MG or JY. If you are over lv.41 at RT the Outpost Guard will use a M82A2.

Results

When the Outpost Attack ends successfully or at least not in a total loss, everyone who participated and helped enough will get an extra experience bonus - in addition to the + 50% experience bonus per kill during the defense. The bonus depends on the type of result and the level of the Survivor.

Currently, there are 4 different ways how an Outpost Attack can end, depending on the total status at the end of the OA timespan.

The status...

...Winning Easily turns into a Total Victory

...Winning Slightly turns into a Marginal Victory

...Losing Slightly turns into a Defeat

...Losing Badly turns into a Crushing Defeat

The Bonus Experience Formula is Level x Bonus Value x Result = Bonus Experience

Level = Your Character Level
Bonus Value = A value depending on your character level. The Bonus Value for Level 24 - 200 is 300 while the Bonus Values for all lower levels seems to be either 150 or 200, depending on some other unknown parameters.
Result = The Outpost Attack Result. For a Total Victory the Multiplier 3, for a Marginal Victory 2, for a Defeat 1 and 0 for a Crushing Defeat.

For example, a Level 50 Character will get 15,000 Experience as Outpost Attack Bonus after a Defeat, yet 30,000 for a Marginal Victory, and 45,000 for a Total Victory.