The Infected Horde event is an event that twice every two weeks, during which every city in your alliance is attacked by waves of infected hordes.

State of Survival Infected Horde Event

04/11/2020 - -

Explanation on how the Infected Horde Event in State of Survival functions, and tips on how to do well. Note that this video does not show the actual Infected Horde event in action.

How the Infected Horde Event Works

When it is activated the Infected Hordes will attack your alliance in twenty waves. Waves 1-9 and 11-19 attack cities, waves 10 and 20 attack the Alliance Headquarters. During each wave it is the goal for each player to kill at least 50% of the attacking invaders, for which points can be scored, an increasing amount for each wave. When a city kills less than 50% it burns, a city that burns twice will no longer be attacked.


For each city as an alliance you can achieve points, so it is best to keep as many cities in the game as long as possible.

As a preparation step you should make sure everyone in the alliance knows when the Infected Horde Event will commence, so that not only as many people as possible are online, but also that people who are not online, keep their troops in their city (as opposed to gathering).

During the event reinforcing other cities is very important, there are three situations in which this can be useful.

Early on the stronger players can reinforce the weaker with part of their troops, so that the weaker stay longer in the game.

At the end the weaker players can reinforce the strong to keep them longer in the game.

You hardly lose any troops (and what you lose will be wounded) during this event and during each wave the aim is to do at least 50% damage. Since defense is not important, focus on damage dealers like Hunters and Riders, and leave out the defensive oriented Infantry (unless you are unable to have a full march without Infantry) when you are reinforcing another player or the Alliance HQ.

For the Alliance Headquarters always make sure the player with highest Command Station level is the first to reinforce. The Command Station level of the first player reinforcing determines the total reinforcement capacity.

Note that it is best to only reinforce when someone is no longer able to defend on his own. This is because there are a maximum amount of points for each wave for each city. If someone could do 100% of damage on his own and you reinforce him and do 50% damage, you gain points, but you take the away from your alliance mate. This can lead to frustration because ranking high (or sort of high, I have gotten ranking rewards for ranking 420 in the event) is very important for rewards.

Note that some test seem to indicate that you perform better if you sent out all infantry troops from your city (e.g. send them gathering, or camp them outside).

Wave Breakdown

As already mentioned wave 10 and wave 20 are special waves, they target the alliance headquarters instead of player cities. There are some other waves that are special too, wave 7, 14 and 17. Those are waves were only a relatively small number of settlements are targetted, but they are targetted by a larger amount of troops, Horde Masters. If you are not attacked during those waves, it is good to reinforce other players, especially during Wave 14 and 17.

Find below all wave info in tabular format.

Wave Nr. Points Comment
20 387000 Alliance Headquarters
19 36908
18 35120
17 166500 Horde Master
16 31500
15 29700
14 139500 Horde Master
13 26100
12 24300
11 22500
10 207000 Alliance Headquarters
9 18900
8 17100
7 71756 Horde Master
6 13500
5 11700
4 9900
3 8100
2 6300
1 4500

Note that Points in italic are estimates based on available data.

Might be difference in points in different difficulty of the Infected Horde.

Additional Info

Some people will use the Infected Horde event as an opportunity to attack your hive. Because there are many cities burning and a lot of marches, the attacker might not be easily spotted.

You do not need to be unshielded to participate in this event, the Infested Horde will attack whether you have a peace flare up or not.

You only suffer minor losses during this event.

Do not forget to repair your Wall Defenses after the event is over.


Based on the alliance points and your own points you get an amount of Alliance Honor as reward. I find this not very interesting, as there are other ways to get Alliance Honor as well.

There are also many solo point ranking rewards. I am not sure how many ranks, but I have ranked 420 and still gotten rewards. For ranking 420 I got some resources and chief equipment materials (1500 Advanced Alloy, 20 Adhesive, and 7 Chief Gear Tools). Doing well in this event can help you get better chief gear faster.


I hope this guide explains how the Infected Horde Event works and how you can score many points with your alliance. If you have additional tips or questions, please share in the comment section.

User Comments