
Sentry System
Sentry System is a tower defense roguelike where you collect, modify and upgrade your sentries while progressing through a network of challenging encounters.
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What are keyshops?About Sentry System
Modify Your Sentries
Choose from a wide selection of sentries. Change damage types, add new status effects, and improve stats. Create powerful builds and combos with smart use of status interactions. Explosions that trigger explosions, stunning lightning chains and massive damage over time effects are waiting to be built. The most powerful effects may come with large drawbacks, but hard choices can lead to great payoffs.
Interactive Environments
Use your sentries to charge devastating explosive devices, power up amplifying antennas using generators, move map tiles, and much more. Use the environment to your advantage and defeat enemies in creative ways. Different enemies will require different counters, and mastering the environment is key to defeating challenging bosses.
Diverse Enemies
Encounter a wide variety of enemies with powerful abilities. Enemies may shield others, accelerate, teleport, explode when defeated, and much more. Different sentries and status effects counter different enemies, so choose your weapons carefully.
Dynamic Bosses
Face off against challenging bosses in large encounters that test your skill with sentries as well as environmental mechanics. Every boss is an intricate puzzle where skill and strategy will be rewarded.
Roguelike Progression
Advance through a randomized network. Take routes that lead to items you need, trade some of your resources for others, and make the best of randomized choices. Resource management between battles is critical to success, as is building a varied roster of sentries that can tackle any challenges you face.
Classic Tower Defense Gameplay
Use your sentries to build mazes and control the routes your enemies take. Lead them down winding paths, past explosive devices, and into deadly choke points. Set up perfect positions for your sentries to maximize their damage.
Game details
Game details
Age ratings
Game modes
Languages
Features
Sentry System price history
Lowest tracked price: €1.16 (Jul 7, 2026) · current best: €7.79.
Sentry System reviews
67% positive reviews all-time.
Sentry System — frequently asked questions
Where can I buy Sentry System at the cheapest price?
Right now the cheapest offer for Sentry System is €7.79 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price Sentry System has ever been?
The lowest price KingsPrice has tracked for Sentry System is €1.16 (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 can I get Sentry System at a discount?
Create a free price alert on this page and KingsPrice will email you when Sentry System 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: Intel i5, 7th generation (or equivalent)
- Memory: 1 GB RAM
- Graphics: NVIDIA GeForce GTX 1050 (or equivalent)
- DirectX: Version 11
- Storage: 1 GB available space
- Additional Notes: Expected 60 FPS at 1080p resolution on minimum requirements
Recommended
- Requires a 64-bit processor and operating system












