Survivors under Siege is a minimalist top-down action RTS where you control a squad to defend vital objectives from waves of zombies and mutant creatures. Survive each level through strategic positioning, smart use of weapons and items, and precise timing.

<h2 class="bb_tag" ><strong>Overview</strong></h2><p class="bb_paragraph" >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.</p><p class="bb_paragraph" >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.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/806ccc219d85a56e23808b1fa1f17577.poster.avif?t=1769878580" width=1170 height=658 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/806ccc219d85a56e23808b1fa1f17577.webm?t=1769878580" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/806ccc219d85a56e23808b1fa1f17577.mp4?t=1769878580" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>Unique Levels</strong></h2><p class="bb_paragraph" >Each level features a different layout and challenge. Purifiers attract enemies — you must protect them to survive and win.</p><h2 class="bb_tag" ><strong>Strategic Skill Tree</strong></h2><p class="bb_paragraph" >Unlock a wide range of upgrades that shape your tactics and offer new ways to play.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/3190b0b58fed2c34f5de158f72c17066.poster.avif?t=1769878580" width=1170 height=366 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/3190b0b58fed2c34f5de158f72c17066.webm?t=1769878580" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/3190b0b58fed2c34f5de158f72c17066.mp4?t=1769878580" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>Weapons &amp; Items</strong></h2><p class="bb_paragraph" >Weapons and tools are limited. Use them smartly to overcome each level.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/054d6b379a692cb7e619aa35624eb4c1.poster.avif?t=1769878580" width=1170 height=658 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/054d6b379a692cb7e619aa35624eb4c1.webm?t=1769878580" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3305010/extras/054d6b379a692cb7e619aa35624eb4c1.mp4?t=1769878580" type="video/mp4"></video></span></p><p class="bb_paragraph" ></p>

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Survivors Under Siege Achievements