How often is Infected Horde in State of Survival?

It unlocks every two weeks and is started by an Alliance Leader or R4.

How long does Infected Horde last?

About 40 minutes across 20 waves.

Which waves attack the alliance HQ?

Waves 10 and 20. Both need garrison troops sent via the garrison button.

Which waves target individual members?

Waves 7, 14 and 17 hit a few random members. Everyone not targeted should reinforce.

What rewards does Infected Horde give?

Individual rewards based on your ranking, plus alliance rewards based on the team score. It also feeds alloys used for chief gear and badges.

What are Plague Zones?

A weekly event running Monday to Sunday midnight UTC, awarding epic hero fragments, Chief XP, advanced alloy and resources for attacking or neutralising plague zones.

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Intermediate

State of Survival Infected Horde Guide: 20 Waves, 40 Minutes

Last Updated: August 1, 2026

Published: August 1, 20266 min read