Steam

BastionOS

Also known as BastionOS, b, bastionos

A short active incremental game where you stack ludicrous weapons and upgrades onto a tower. Destroy a gigantic evolving horde, unlock new tech, repeat.

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Last update

23 May 2026

Original sources

Latest update

AnnouncementPublished 06 May 2026

v1.0.1dPatch 1.0.1d

Set max collection caps for resources. Added an extra internal step for checking achievements, in case they didn't register the first time. Added some clarifying labels and icons to tabs and setting screen. Added an opt…

4 changesFixGameplay

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Latest updates

Update history

Browse past updates and patch notes for this game.

5updates

April 2026
First Day PatchHello everyone, First of all, thank you all who have played the game. In this update we have fixed the Professor achievement, you should have it when you launch the game, if you have completed the Task for it. Also fixe…Announcement1 changeFix29 Apr 2026
BastionOS is available NOW with a 40% Release DiscountBastionOS is now available on Steam, with a whopping 40% discount, so that you don't have to wait for a sale. Look at all these features: Destroy GIGANTIC machine hordes Unlock a HUMONGOUS skill tree with 170+ nodes Stu…Announcement2 changesGameplay28 Apr 2026
December 2025
Demo version 1.1cThis update we have: Tons of visual additions and improvements, including updated research screen, damage info during gameplay, enemy types, and post processing (customizable in settings) Added localisation for Japanese…Announcementv1.1c3 changesFixBalance06 Dec 2025
November 2025
Demo version 1.1bWe have made some changes to our demo. Limited FPS to 60 Rebalanced level progression, weapon/enemy stats, and resource distribution for a smoother experience Made resource collection range clearer Added tooltip to Augm…Announcementv1.1b7 changesFixPerformance26 Nov 2025

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