IMHO.

Games like Sentry System

If Sentry System is your kind of game, the closest matches are Cosmic Raze, Slotbound and Books of Grandura — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About 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.

2024StrategyIndie7.99 USDWindowsby Penguinium
Sentry System — Steam game cover

Players who liked Sentry System also play

Steam players who put hours into Sentry System also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Cosmic Raze

    WHY THIS

    Top pick for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    Cosmic Raze is a sci-fi tower defense strategy game. Control advanced weapons, build powerful synergies, and then blast away as aliens attempt to conquer Earth. Between rounds you'll earn unique augmentations, purchase and upgrade a huge variety of weapons, and unlock powerful synergy bonuses.

    2025ActionStrategyIndie3.49 USDDeck VerifiedSteam ↗
  2. Slotbound

    WHY THIS

    Second-strongest match for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    A roguelike auto-battler defense where luck meets strategy. Spin a 3x3 slot machine to summon units and grow your army by absorbing others. Use Items and Cores to manipulate the odds and survive challenging judgement waves and boss waves. Every spin and every choice counts.

    2026StrategyIndieSteam ↗
  3. Books of Grandura

    WHY THIS

    Third-strongest match for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    Play an auto battler, a traditional roguelike or a tower defense and experience the world of Grandura. Reuse what you've learned about the creatures, abilities and items that are found in this world and apply them in different game modes.

    2024ActionStrategyIndie9.99 USDSteam ↗
  4. TD Worlds

    WHY THIS

    Ranked #4 for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    TD Worlds is a dynamic, highly strategical game that challenges your skill. Build an impenetrable defense and get ready to plunge into a new, unknown world to uncover its secrets. Use Twitch integration and play with your viewers.

    2022StrategyIndie10.99 USDDeck VerifiedSteam ↗
  5. Tower Escape

    WHY THIS

    Ranked #5 for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    Tower Escape is a reverse tower defense game, where instead of defending against incoming enemies, you play the baddies and guide your minions to the exit. Recruit a team of minions, and collect powerful gems and relics that make each run unique.

    2023StrategyIndieCasual3.19 USDDeck VerifiedSteam ↗
  6. The Sentinel

    WHY THIS

    Ranked #6 for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    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?

    2023StrategyIndieCasual0.49 USDSteam ↗
  7. Button Pop

    WHY THIS

    Ranked #7 for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Strategy and Indie with Sentry System.

    Button Pop is a 3D Tower defense game fused with Button mashing chaos. Construct the deadliest defense strategies by unlocking powerful traps and turrets across a variety of terrains, while building your very own button with the rewards of your adventures!

    2024ActionStrategyIndie10.59 USDSteam ↗
  8. Maze Keeper

    WHY THIS

    Ranked #8 for Sentry System fans by collaborative filtering across millions of Steam libraries. Shares Indie with Sentry System.

    You are the guardian of a cursed labyrinth and must prevent an adventurer from escaping with the help of your monsters. But the adventurer keeps trying again and again, accumulating levels and getting stronger... Survive to the highest possible level !

    2024Indie8.99 USDDeck PlayableSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Sentry System at current Steam store prices.

  1. POSTAL 2

    WHY THIS

    Priced ~88% under Sentry System on Steam right now. Shares Indie with Sentry System.

    Live a week in the life of "The POSTAL Dude"; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman's autograph, what could possibly go wrong?

    2012ActionIndieAdventure0.99 USDDeck VerifiedSteam ↗
  2. Buckshot Roulette

    WHY THIS

    Priced ~63% under Sentry System on Steam right now. Shares Indie with Sentry System.

    Play Russian roulette with a 12-gauge shotgun. Four enter. One leaves. Roll the dice with your life. Good luck!

    2024ActionIndieSimulation2.99 USDDeck PlayableSteam ↗
  3. GRIS

    WHY THIS

    Priced ~53% under Sentry System on Steam right now. Shares Indie with Sentry System.

    Gris is a hopeful young girl lost in her own world, dealing with a painful experience in her life. Her journey through sorrow is manifested in her dress, which grants new abilities to better navigate her faded reality.

    2018IndieAdventure3.74 USDDeck VerifiedSteam ↗
  4. The Test

    WHY THIS

    Priced ~75% under Sentry System on Steam right now. Shares Indie with Sentry System.

    You will answer a series of questions that will reveal truths from deep within. These questions may make you uncomfortable, but with great knowledge comes great sacrifice. Can you make it all the way through The Test, and if you do, are you sure you want the answers you seek?

    2020IndieAdventureSimulation1.99 USDDeck VerifiedSteam ↗
  5. Milk inside a bag of milk inside a bag of milk

    WHY THIS

    Priced ~81% under Sentry System on Steam right now. Shares Indie with Sentry System.

    A short story about what sort of challenges everyday little things can be. Help the girl buy milk, be the first not to disappoint her.

    2020IndieAdventure1.49 USDDeck PlayableSteam ↗
  6. Crypt of the NecroDancer

    WHY THIS

    Priced ~63% under Sentry System on Steam right now. Shares Indie with Sentry System.

    Crypt of the NecroDancer is an award winning hardcore roguelike rhythm game. Move to the music and deliver beatdowns to the beat! Groove to the epic Danny Baranowsky soundtrack, or select songs from your own MP3 collection!

    2015ActionIndieRPG2.99 USDDeck VerifiedSteam ↗
  7. A Short Hike

    WHY THIS

    Priced ~50% under Sentry System on Steam right now. Shares Indie with Sentry System.

    Hike, climb, and soar through the peaceful mountainside landscapes of Hawk Peak Provincial Park as you make your way to the summit.

    2019IndieAdventure3.99 USDDeck VerifiedSteam ↗
  8. Super Hexagon

    WHY THIS

    Priced ~63% under Sentry System on Steam right now. Shares Indie with Sentry System.

    Super Hexagon is a minimal action game by Terry Cavanagh, with music by Chipzel.

    2012ActionIndie2.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableSteam ↗
  2. Control, I'm Not Coming Back

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    Control, I'm Not Coming Back is a short and emotional narrative game about a lost astronaut searching for a reason to keep going forward while facing the emptiness of space. Inspired by the Hopecore aesthetic, it’s a story about positivism, friendship and our human connection with Voyager 1.

    2026IndieAdventureFree To PlayFreeSteam ↗
  3. Landfall Archives

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Strategy and Indie with Sentry System.

    Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!

    2023ActionStrategyIndieFreeSteam ↗
  4. Aircar

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    A simple immersive flying game built for VR. Pilot an aircar through a futuristic cityscape.

    2019IndieFree To PlayCasualFreeSteam ↗
  5. Tukoni: Prologue

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    Tukoni: Prologue is a point-and-click puzzle adventure, based on a series of award-winning books by the Ukrainian artist Oksana Bula. Play as Tukoni, the forest spirits, as you meet unique characters, solve captivating puzzles, craft new items, and explore a magical world filled with kindness.

    2020IndieAdventureCasualFreeSteam ↗
  6. Samorost 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    Explore the beginnings of the Samorost series in the space gnome’s original bite-sized adventure, formerly released in 2003. Now with remastered sounds, enhanced graphics, and new music by Floex.

    2021IndieAdventureCasualFreeSteam ↗
  7. Epic Battle Fantasy 3

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    Epic Battle Fantasy 3 is a silly turn-based JRPG, full of useless NPCs, rabid cats, childish humor, unreasonably large weapons, anime boobs, and other nonsense. And it's totally free!

    2016IndieAdventureRPGFreeDeck PlayableSteam ↗
  8. DOGWALK

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Sentry System.

    Explore a hand-crafted winter forest as a big adorable dog and a little kid in tow. A short, free, open source project brought to you by Blender Studio.

    2025IndieFree To PlayCasualFreeDeck PlayableSteam ↗

Plays great on Steam Deck

Valve-Verified or Playable picks from the similar pool — ready to go on Deck out of the box.

  1. Cosmic Raze

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Strategy and Indie with Sentry System.

    Cosmic Raze is a sci-fi tower defense strategy game. Control advanced weapons, build powerful synergies, and then blast away as aliens attempt to conquer Earth. Between rounds you'll earn unique augmentations, purchase and upgrade a huge variety of weapons, and unlock powerful synergy bonuses.

    2025ActionStrategyIndie3.49 USDDeck VerifiedSteam ↗
  2. TD Worlds

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Strategy and Indie with Sentry System.

    TD Worlds is a dynamic, highly strategical game that challenges your skill. Build an impenetrable defense and get ready to plunge into a new, unknown world to uncover its secrets. Use Twitch integration and play with your viewers.

    2022StrategyIndie10.99 USDDeck VerifiedSteam ↗
  3. Tower Escape

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Strategy and Indie with Sentry System.

    Tower Escape is a reverse tower defense game, where instead of defending against incoming enemies, you play the baddies and guide your minions to the exit. Recruit a team of minions, and collect powerful gems and relics that make each run unique.

    2023StrategyIndieCasual3.19 USDDeck VerifiedSteam ↗

Frequently asked about Sentry System

How much does Sentry System cost?
Sentry System is listed on Steam at 7.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to Sentry System?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Sentry System are Cosmic Raze, Slotbound, Books of Grandura.
Who developed Sentry System?
Sentry System was developed by Penguinium.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Sentry System.

For library-aware picks tuned to your specific taste, sign in with Steam on the home page.