Sentinel

Sentinel

Matthew Brown · April 22, 2014 · Indie, Strategy, Tower Defense, Music

Sentinel is free to play — no purchase needed. We track it so you know if that ever changes.

PC
Mixed65% · 971playing now
Best price
Free
Get it free on Steam

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Cheapest Sentinel keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

CJS CD Keys
CJS CD Keys
Standard Edition · Steam
$2.76
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Screenshots

Sentinel price

Sentinel is free to play — there is no purchase price, on Steam or anywhere else we track. We keep watching it, so if it ever stops being free the price history on this page will show when that happened and what it changed to.

About Sentinel

Sentinel is an interactive audio tower defense game. It mixes strategic game play with a dynamic music system.

The game takes place on a sequencer-like grid. As you add defenses, collect resources and destroy enemies, musical elements are triggered in time to the music.

Fight through 31 levels to clear the virus from the system.

Sentinel — game info

Platforms
Windows, macOS, Linux / SteamOS
Steam Deck
Verified
Player modes
Single-player
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Oct 24, 2025
‎
1 found this helpful
Not recommended Jul 3, 2026
https://youtu.be/eRUJzGUCHEE Adding the 'audio' label to 'tower defense' doesn't appear to be meaningful as players will spend most of their focus fiddling with power settings on towers.
Recommended Jan 25, 2026
ᅠ
Recommended Oct 27, 2025
Игра "Sentinel" - это захватывающая головоломка с видом от первого лица, которая подкупает своей минималистичной, но атмосферной графикой и медитативным геймплеем. Игроку предстоит стратегически размещать турели, зеркала и другие устройства для защиты от наступающих Сентинелов, постепенно продвигаясь вверх по ландшафту. Что особенно затягивает, так это необходимость тщательно планировать каждый ход и использовать ресурсы с умом. Один неверный шаг может привести к поражению, заставляя переосмыслить стратегию. Игра требует не только логики, но и пространственного воображения, ведь ключевую роль играет позиционирование и использование ландшафта в своих целях. Хотя "Sentinel" может показаться простой на первый взгляд, она предлагает глубокий и сложный геймплей, который будет держать вас в напряжении на протяжении всего прохождения. Отсутствие экшена компенсируется ощущением тактического превосходства, когда, наконец, удается одолеть волну врагов. Это отличный выбор для тех, кто ищет неспешную, но увлекательную головоломку, требующую внимательности и стратегического мышления.
Recommended Jul 25, 2025
[h1] …
Recommended Jul 21, 2025
This game makes you think, it's a puzzle game in the guise of a tower defense game with funky visuals, it's more of a strategy game than most other tower defense games (micromanagement hell), and personally? I liked it a lot! I did not play hexcells, but I do know that it exists. I did not know that the guy who made that one also made this one, and I was aware of this games existance earlier than hexcells!

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