Fallout Shelter

Raider Attacks are a specific random event that happens occasionally during regular play. It's very obvious, as an alarm will begin blaring (as with any negative random event) and you will see the scum running down the path to break down your door.

During this siege, the raiders will begin depleting your resources. These attacks will get progressively more violent and difficult to defend against as you get more dwellers and defeat more raiding parties, but luckily I seemed to easily defeat them as I got around 15 armed dwellers to fight back.

The main defense is arming your dwellers. You can do this by selecting them and giving them weapons and outfits to help combat the threat. You should work on equipping everyone in your vault at all times, this will help against any kind of disaster that may occur and will keep your storage from filling too quickly.

The Raiders will move from room to room, attacking anyone in their path (excluding pregnant women and children, the saintly knights they are). From my experience so far, they will not stay in a room if there is no able-bodied resistance in the room with them. They will stay to fight whoever happens to be in the rooms they enter, but will only stay for a short amount of time until they decide to move on, regardless if they killed anyone or not.

The raiders move from floor to floor, before reaching the bottom. They will fight in the last room that has warriors and then they will flee. If you do not kill them before this happens, the Raid will not count as stopped.

You can put well armed dwellers in the first room of the vault, called the Vault Door room, to assign them as guards for Raider defense. In my case, I do not worry about it too much. I have (at the time of writing) 30 dwellers and all of them are armed decently well, so the raiders never make it more than 5 rooms into their siege.

If you want to check your progress, there is a counter under the stats page for Raider Attacks Stopped. It's located under the "Cumulative Since (Current Date)" header in the Stats page.



EDIT: I have been playing on the Windows 10 version of the game, and have been idle'ing for some of my Raider Attacks, which seems like a decent way to farm them. Note, that if you idle you run the risk of multiple random events damaging characters, with the result of some of them dying in raids or fires, ect. Keep an eye on the vault when you hear the siren blaring.

Also, it would seem that the more vault dwellers you have, the higher likelihood that you get a different assault, albeit from Ghouls or Deathclaws. This will unfortunately just take more time away from you, and I don't know how to exploit Raider only attacks as of yet

People are recording Feral Ghoul attacks as low as 40 Dweller population, so you might want to try grinding this achievement out with >40 population before going for the higher room achievements.

While going forward and increasing population in your vault is, generally speaking, good idea, there is one milestone where you should stop for few days. This is 35 dwellers. Why? There are three very good reasons for this.

1) It is perfect opportunity to train your dwellers. Their abilities will be probably quite low so you should steadily make them stronger. Your consumption will be the same (if you keep the same number of rooms), so if 6 level 5 P guys were able to supply your vault with water, you will know how much P you want to produce to stay at the same level. Moreover, 3 guys with maxed Perception will produce the same amount of water, as 6 guys with 5 P. However, you will free three of your dwellers for other tasks.

2) You will be attacked only by raiders. Of course it is similar with lower numbers, but getting 35 dwellers unlocks fitness room for your vault. This helps you to:

3) Optimize your future dwellers. From all SPECIAL stats there is one, which is crucial for every low level dweller. This is of course your E - Endurance. It increases number of HP your dwellers get from each level up. Let's look at the equation. HP per level = 2.5 + (E * 0.5). You can get 17 points of Endurance, you need to max your E stat and equip Heavy wasteland gear. If you don't have it, you should equip your best Endurance outfit. Let's say you got Wasteland gear, which is popular common item. While equipping it for your 10 Endurance level 1 dweller you will get 9 hp per each level up (2,5+6,5). Multiply it by 50 levels and it means that person with this set will get 450 HP, while regular 1 E character will get only 150 HP. The difference is huge and that's why you want to max Endurance for every character in your vault as fast as possible. This will take of course some time, so you might as well stop some raiders along the way.

How should you get your wonderkids? When you get 30 dwellers, make 5 more babies. When they grow up, they should be sent to fitness room. Remember, your dwellers do not gain any XP while they train, you can leave them in training room and they won't accidently level up.

Who should defend your entrance? Your newly 'produced' wonderkids should be armed and have their Strenth and Agility maxed. Why? Strength will increase their damage (10 Strength means that they will always hit with top damage of their gun) and Agility will make them shoot faster. Two rooms of such monsters will prevent anyone from getting too far inside your vault. Moreover, they will make perfect base for your next 'super people'.

This was the last achievement I had to get in this game, it took me around 50 hours of AFK gameplay to get it.

I did this with a max of 200 Vault Dweller's which meant roughly 1 Raider attack Per Hour.
I have heard by doing this with around 25 Dwellers is most efficient, as you expect to receive up to 3 Raider attacks per hour due to not being attacked by Deathclaws, Ghouls etc..

My method for AFKing this was to Put my 2 Best Dwellers in the Vault Door Security room, and equip them with the Highest DPS weapon, and Highest Endurance Armor. It is highly beneficial to equip these two vault dwellers with a HP Recovery Pet, as this essentially makes them completely unkillable. I would leave the game on overnight and come back to both of them being full HP.

A small tip would be to not upgrade your Vault Door, since you cannot kill the enemies while they are breaking into your vault, you want them to get in as quick as possible.

THIS IS NOT A FULL GUIDE…

…rather, this is a useful tip I found while hunting for any information on how to speed up this RNG achievement. If you were lucky enough to receive Dogmeat as a pet from a lunchbox, his bonus gives a “3x objective completion” to any dweller he is equipped to. If the same dweller that Dogmeat is assigned to then actively participates in defending against the raiders, it counts a single raider attack as three. So instead of the achievement tracker going up 2% it will go up by 6% for each successful raider attack stopped. Essentially, this achievement can be unlocked before you actually defend against 50 attacks, and can be unlocked after just 17 if you play your cards right.

After trying all sorts of solutions (and by that, I don't mean to rebuild the Vault), I've found a possible solution on Steam that may or may not have helped me.

https://steamcommunity.com/app/588430/discussions/0/13551450...

Below I have pinned you pictures of my Vault to show you my structures.

^{If you have any questions, suggestions, or critic, the best way to tell me is the comment-section :)}
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This solution in German: