BastionOS is an incremental action game where you command a military terminal to stack ludicrous weapons and upgrades onto a lone tower facing an endless machine army. Destroy a gigantic evolving horde, get destroyed, unlock new tech, repeat, and get strong enough to survive the next level.

<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/740699f50b58ba1d236998e6590a05f9.poster.avif?t=1771799323" width=1000 height=400 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/740699f50b58ba1d236998e6590a05f9.webm?t=1771799323" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/740699f50b58ba1d236998e6590a05f9.mp4?t=1771799323" type="video/mp4"></video>//This Demo includes the first 5 of 25 total levels, and early stages of the skill tree. //Select a level, and aim your tower's artillery towards incoming enemies. BOOM! Grab any precious resources the enemies drop.<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/7300cc25376c9d22405201874cc50220.poster.avif?t=1771799323" width=1000 height=562 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/7300cc25376c9d22405201874cc50220.webm?t=1771799323" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/7300cc25376c9d22405201874cc50220.mp4?t=1771799323" type="video/mp4"></video>//The tower will inevitably fall. Under your command it will, however, rise even stronger. Fortify your tower with weapons and upgrades.<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/ae48390dd2ead645cedde648dcba4d13.poster.avif?t=1771799323" width=1000 height=562 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/ae48390dd2ead645cedde648dcba4d13.webm?t=1771799323" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/ae48390dd2ead645cedde648dcba4d13.mp4?t=1771799323" type="video/mp4"></video>//Research new and increasingly powerful tech.<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/05d8b569306ea1709adbf5e8ff66ff26.poster.avif?t=1771799323" width=1000 height=562 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/05d8b569306ea1709adbf5e8ff66ff26.webm?t=1771799323" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/05d8b569306ea1709adbf5e8ff66ff26.mp4?t=1771799323" type="video/mp4"></video>//Defend the Bastion until the end. You and your weapons research program are the last line of defense against the machine army. There's no telling if this reckless operation will allow Humanity to survive. What will happen when the horde becomes insurmountable?<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/f9c4ea23b05bbc14f1cccd1dfdf0b9c7.poster.avif?t=1771799323" width=1000 height=562 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/f9c4ea23b05bbc14f1cccd1dfdf0b9c7.webm?t=1771799323" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4090800/extras/f9c4ea23b05bbc14f1cccd1dfdf0b9c7.mp4?t=1771799323" type="video/mp4"></video>

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BastionOS Demo Achievements