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.
Offers
What are keyshops?Multipacks (6)
About BastionOS
//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?
Game details
Game details
Age ratings
Game modes
Languages
Features
BastionOS price history
Lowest tracked price: €2.64 (Jul 7, 2026) · current best: €3.30.
BastionOS player count & reviews
89% positive reviews in the last 30 days (97% all-time) · 8 peak players in the last 30 days.
BastionOS — frequently asked questions
Where can I buy BastionOS at the cheapest price?
Right now the cheapest offer for BastionOS is €3.30 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price BastionOS has ever been?
The lowest price KingsPrice has tracked for BastionOS is €2.64 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
How many people play BastionOS?
BastionOS peaked at 8 concurrent players on Steam in the last 30 days (highest on Jul 9, 2026). The player chart on this page updates daily.
How can I get BastionOS at a discount?
Create a free price alert on this page and KingsPrice will email you when BastionOS drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
System requirements
Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: 2.0 GHz
- Memory: 4 GB RAM
- Graphics: GPU with basic DirectX 11 support
- DirectX: Version 11
- Storage: 200 MB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: 2.0 GHz
- Memory: 4 GB RAM
- Graphics: GPU with basic DirectX 11 support
- DirectX: Version 11
- Storage: 200 MB available space
