Steam game

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.

$1.98 April 28, 2026

By Feral Paw

Windows macOS
View on Steam
BastionOS - Feral Paw. Popular. Released April 28, 2026
Screenshot of BastionOS gameplay showing in-action mechanics Screenshot 2 of BastionOS - additional gameplay view Screenshot 3 of BastionOS - more gameplay footage Screenshot 4 of BastionOS - final gameplay screenshot

Overview

About this game

//Select a level, and aim your tower's artillery towards incoming enemies. BOOM! Grab any precious resources the enemies drop.

//The tower will inevitably fall. Under your command, it will rise even stronger. Fortify your tower with weapons and upgrades.

//Research new and increasingly powerful tech.

//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?

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