Sentinel overview

Matthew Brown | Apr 22, 2014 | game

Released

0players observed · 3 October 2026 - 14:51:45 UTC

Indie Strategy Tower Defense Music Steam Store

Latest observed playersNot available
SteamPulse tracked peak2
Units sold (VGI)8,465
Revenue (VGI)$10,899
Review score65% positive

Sentinel dated player observations, monthly player trends, reviews, and game metadata are tracked on SteamPulse.

Latest observed playersNot available
SteamPulse tracked peak2
Units sold (VGI)8,465
Revenue (VGI)$10,899
Review score65% positive
Total reviews95
Release dateApr 22, 2014
DeveloperMatthew Brown
PublisherMatthew Brown

Genres: Indie, Strategy

Company pages: Developer: Matthew Brown Publisher: Matthew Brown

Top Steam charts Top 100 games Game directory Steam Store page

Game overview

Overview

Sentinel comes from Matthew Brown and is published by Matthew Brown. It arrived on Steam on Apr 22, 2014, and it sits naturally among Single-player, Steam Achievements, and Family Sharing. SteamPulse tracks it across Windows, macOS, Linux, and Steam so readers get a quick useful snapshot, not just a wall of numbers.

Players and reviews

Sentinel's latest SteamPulse observation recorded 0 players at 3 October 2026 - 14:51:45 UTC, with a tracked peak near 2. This peak is the highest value in the available SteamPulse record and may not include activity before tracking began. Player reaction is 65% positive across 95 reviews.

Language and system requirements

Sentinel is available in 1 languages including:

English

regional rating details listed by Steam when available

Platform	Type	OS	Processor	Memory	Graphics	Storage
Windows	Minimum	Not listed	2.0Ghz+	2 GB RAM	Shader Model 2.0+	750 MB available space
macOS	Minimum	OSX 10.5 or later	2.0Ghz+	2 GB RAM	Shader Model 2.0+	750 MB available space
Linux	Minimum	Ubuntu 10.04 or later	2.0Ghz+	2 GB RAM	Shader Model 2.0+	750 MB available space

Sales, recommendations, and streams

Sentinel has sold up to 8,465 units and has recommendation data pending. The estimated VGI revenue is $10,899. On Twitch, 0 streamers are live with around 0 total watchers.

Detailed game overview

Sentinel overview details

Sentinel combines live player counts with reviews, pricing, platform support, Store metadata, dated player history, media, recent news, and related games.

Steam Store description

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.

SteamPulse editorial summary

Sentinel is listed as a game with Free to play. It supports Windows, macOS, and Linux, belongs to Single-player, Steam Achievements, and Family Sharing, and is associated with Indie and Strategy. SteamPulse's latest observation records 0 players at 3 October 2026 - 14:51:45 UTC, a tracked peak of 2, and 65% positive reviews.

Overview facts

Field	Value
Game	Sentinel
Steam App ID	293200
Type	game
Release date	Apr 22, 2014
Developer	Matthew Brown
Publisher	Matthew Brown
Price	Free to play
Platforms	Windows, macOS, and Linux
Genres	Indie, Strategy
Categories	Single-player, Steam Achievements, Family Sharing
Supported languages	English
Website	Official website

Player and review overview

Metric	Value
Latest observed players	0 · 3 October 2026 - 14:51:45 UTC
SteamPulse tracked peak	2
Positive reviews	62
Negative reviews	33
Total reviews	95
Positive percent	65%
Review type	Mixed
Recommendations	Not available
Average playtime	533 minutes

SteamPulse record freshness

Field	Value
Steam release date	Apr 22, 2014
Official Steam feed update (UTC)	2 January 2018 - 16:06:48 UTC
SteamPulse last record update (UTC)	3 October 2026 - 14:51:45 UTC
Live player count updated (UTC)	3 October 2026 - 14:51:45 UTC
Store metadata updated (UTC)	3 October 2026 - 14:51:45 UTC

Overview tags

Indie Strategy Tower Defense Music

Highlighted achievements

Achievement	Description
Gate 1	No description
Gate 2	No description
Gate 3	No description
Gate 4	No description
Gate 5	No description
Core	No description
Strategist	No description

Support and legal notes

Field	Value
Support email	[email protected]
Support URL	Support page
Legal notice	Not available

References

Official and third-party reference links for checking this Steam app outside SteamPulse.

Reference	Link
SteamPulse canonical	https://steampulse.org/game/293200
Steam Store	https://store.steampowered.com/app/293200/
Steam Community	https://steamcommunity.com/app/293200
PCGamingWiki search
IGDB search	Search IGDB for Sentinel

Game FAQ

Real questions answered from SteamPulse data, including live players, monthly momentum, review sentiment, regional audience signals, Twitch activity, and current Steam pricing.

What is the latest observed Steam activity for Sentinel?

Sentinel's latest SteamPulse observation records 0 players at 3 October 2026 - 14:51:45 UTC, with a tracked peak of 2 concurrent players in the available SteamPulse record. SteamPulse also records about 9 hours of average lifetime playtime.

Is Sentinel growing or declining recently?

October 2026 is still in progress. The month-to-date average is 0 players; the highest observed daily value is 0 players. Available values are provisional and will continue changing until the UTC month closes. The completed comparison month is September 2026.

What country-level audience data is available for Sentinel?

In the observed sample of public reviewer profiles with a visible country, the leading shares are United States (33.3%), Russia (12.5%), Canada (8.3%). The separate directional player-region model assigns its leading shares to United States (29%), Russia (11.2%), Poland (6.9%). The directional follower-region model assigns its leading shares to United States (35.9%), Russia (11.7%), Poland (6.7%). The directional wishlist-region model assigns its leading shares to United States (25.9%), Russia (10.3%), China (7.1%). Only the reviewer view is based on observed public profile countries; the other percentages are modeled relative weights, not verified account locations or country-level user counts.

What does the Steam review footprint look like for Sentinel?

Sentinel currently sits at 65% positive across 95 Steam reviews tracked by SteamPulse, including 62 positive reviews and 33 negative reviews. Steam labels the current review summary as Mixed.

How much follower and Twitch attention does Sentinel have?

Sentinel currently has about 206 tracked Steam followers as of 27 January 2026 - 00:00:00 UTC. On Twitch, SteamPulse is matching roughly 0 live viewers across 0 active streams for the game's category.

What is the current Steam price for Sentinel?

Sentinel is currently listed as free to play on Steam, so there is no paid entry price to compare against an older baseline. SteamPulse still keeps tracking store state, discount fields, and future pricing changes in case that status changes later.

Reviews, pricing, and metadata

Review summary

Mixed

65% positive, 62 positive, 33 negative

Price and discount

Free to play

Platforms

Windows, Mac, Linux

Categories

Single-player, Steam Achievements, Family Sharing

Achievements

Platform releases

Steam 22 April 2014

System requirements

Minimum requirements

Minimum: OS *: Windows XP or later Processor: 2.0Ghz+ Memory: 2 GB RAM Graphics: Shader Model 2.0+ Storage: 750 MB available space Additional Notes: Widescreen monitor required.

Interactive charts, reviews, news, prices, and comparison tools load in the full SteamPulse app.