The Sentinel

68KS
Released Sep 19, 2023by Artur RezendePositive(92% of 13 Steam reviews)

Defend your castle against waves of invaders in 'The Sentinel,' a tower defense game. Strategically upgrade weapons and defenses, make tough choices, and immerse yourself in intense battles. Will you triumph and protect your realm?

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About The Sentinel

Step into the epic world of strategic defense with 'The Sentinel'! Prepare yourself for an exhilarating and challenging gaming experience that will put your tactical skills to the test. At the heart of this tower defense game, you will discover your castle, a sanctuary of glory and fortitude that is under the imminent threat of a horde of voracious invaders.

The action kicks off with a simple cannon, a loyal guardian that stands ready to defend your castle against the forces of darkness. Face initial waves of enemies, each more ruthless than the last. But make no mistake, your journey is merely beginning. As time progresses, new horizons unfold with a vast array of upgrades at your disposal. Hone your weapons, unlock powerful abilities, and deploy defense mechanisms to repel the invaders.

The true key to victory in 'The Sentinel' lies in strategy. Choose wisely which upgrades to apply and when to do so. Do you prefer reinforcing your defenses to withstand a massive assault, or opting for precise attacks to eliminate the most dangerous foes before they draw near? The decision is yours and will shape the fate of your castle.

Don't allow your castle to fall into the hands of the enemies! Join the battle in 'The Sentinel' and prove yourself as a strategist. Command your defenses, enhance your weaponry, and safeguard your kingdom with courage and intelligence. Adventure awaits, victory beckons - are you prepared to face the challenge?

About the gameplay.

The game begins with the player choosing one of the 20 available upgrades. Shortly after, the game starts, and the player controls a small cannon positioned at the top of the castle using the keyboard arrows. This cannon continuously fires spheres that fall due to gravity. These spheres collide with various balloons rising on the screen. Each balloon has a number indicating how many hits it needs to burst. When a balloon reaches a certain height on the screen, the value marked on it is subtracted from the player's cannon life. There is a bar at the bottom of the screen that fills over time.
Every time the bar is fully charged, the player can choose another upgrade. The game ends when the cannon's life count reaches zero, or when the player survives against waves of enemies for 15 minutes. Additionally, there's an upgrade system where the more points the player accumulates during matches, the more upgrades they can choose at the beginning of the game, starting with 1 and going up to a maximum of 10.

Game details

The Sentinel price history

Lowest tracked price: €0.49 (Jul 7, 2026) · current best: €0.99.

The Sentinel reviews

92% positive reviews all-time.

The Sentinel — frequently asked questions

Where can I buy The Sentinel at the cheapest price?

Right now the cheapest offer for The Sentinel is €0.99 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price The Sentinel has ever been?

The lowest price KingsPrice has tracked for The Sentinel is €0.49 (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 The Sentinel at a discount?

Create a free price alert on this page and KingsPrice will email you when The Sentinel 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

Minimum:
  • OS: Windows
  • Processor: i3
  • Memory: 1 GB RAM
  • Graphics: 512mb dedicated, Compatible with Open GL 2.1
  • DirectX: Version 11
  • Storage: 130 MB available space
  • Sound Card: any

Recommended

Recommended:
  • OS: Windows 11
  • Processor: i7
  • Memory: 2 GB RAM
  • Graphics: GTX series
  • DirectX: Version 11
  • Storage: 130 MB available space
  • Sound Card: any

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