Survivors Under Siege
Demo available
About the game
Survivors Under Siege blends action RTS and tower defense into a minimalist tactical experience. Position your units wisely and strike at the perfect moment to stand against waves of zombies and mutants.
Original Steam description
Overview
A mutagenic virus has spread across world, transforming the infected into deadly zombies and mutant creatures. Humanity’s last hope lies in small outposts equipped with purifiers — devices that release cleansing fumes to neutralize the airborne virus.
Command a squad of survivors in this minimalist top-down action RTS. Defend each base from waves of enemies. Every level is a fight to keep the purifiers running — and stay alive.
Unique Levels
Each level features a different layout and challenge. Purifiers attract enemies — you must protect them to survive and win.
Strategic Skill Tree
Unlock a wide range of upgrades that shape your tactics and offer new ways to play.
Weapons & Items
Weapons and tools are limited. Use them smartly to overcome each level.






Demo and release information
A Steam demo was found at the latest check. Confirm it is still available in your region on Steam before downloading.
Steam demo, playtest and Early Access: what is the difference?
Information & artwork: Steam · Last checked UTC