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SENTRY
SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.
In short, Steam reviewers most often praise “FPS tower-defense hybrid” (34 of 66 reviews) and “Co-op makes defense easier” (10); the most common complaint is “Punishing solo difficulty” (14). What reviewers agree on ↓
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28 · quoted reviews as of 2026-05-14.
What reviewers agree on
34 of the 66 reviews raise this.
“I'm honestly surprised this is getting mixed reviews. Sure, there's not an "endless" amount of content, but what's here is so good, so replayable, so clean. You'll find new ways to play every time you sit down for a few…”
10 of the 66 reviews raise this.
“The turrets, especially the shotgun turret, are brutally overpowered. you place all 5 of them and you can literally go afk even on hard difficulty. even without turrets the difficulty is a joke, one you make it through…”
“Has much potential and CAN be very fun - especially when you have someone to play in coop mode. The newer updates and changes they made for the game gave me mixed feelings though. But i wouldnt say its not worth my…”
“Followed this game since Splattercat covered it the first time. The second time he went back to look at it I was convinced to try it out. Co-op wasn't mentioned in his review and was a very pleasant surprise. I only…”
6 of the 66 reviews raise this.
“Fun game! I Pick it up now and then with my friend. Please keep making it better and push for that 1.0 release!”
5 of the 66 reviews raise this.
“Been dying for a good tower defense/shooter hybrid for ages since Hypercharge Unboxed and for the most part, Sentry more than delivers. Decent gun play, trap selection is great and can get pretty challenging. However…”
“An enjoyable FPS / Tower Defense hybrid. A bit challenging, so don't expect to be breezing through waves with no effort. It does get hectic, but there is also plenty of downtime in between to relax, recover, and…”
“The game is pretty fun, it's a nice challenge to defend each sector where enemies breach but it does get very overwhelming very quickly. Another issue I have is why is the CO-OP only limited to 2 players? Why not make…”
4 of the 66 reviews raise this.
“I find this game very fun, even in it's current state, been here since it released and has only kept getting better some things feel pretty unfair at first, specifically the hunter ships, but once everything starts…”
“Very much enjoying it so far. The designers have made it feel like every decision you make really matters. From choice of upgrade, do I let an enemy in vs risk taking damage, do I mag dump or do I conserve my ammo etc…”
14 of the 66 reviews raise this · 8 of them still recommend the game.
“The turrets, especially the shotgun turret, are brutally overpowered. you place all 5 of them and you can literally go afk even on hard difficulty. even without turrets the difficulty is a joke, one you make it through…”
“Currently the game is too hard to complete. Multiple entry points for enemies which are on different sides of the ship makes it too hard to multitask. Feels like the game was made with 2 players in mind. I am certain…”
11 of the 66 reviews raise this · 5 of them still recommend the game.
“Lets talk about what it offers not its potential. Its got potential. The game as is, is not close to finished. Its missing a reason to play. The rougelikeness of the game is not complete. You dont really feel the need…”
“The turrets, especially the shotgun turret, are brutally overpowered. you place all 5 of them and you can literally go afk even on hard difficulty. even without turrets the difficulty is a joke, one you make it through…”
“Currently the game is too hard to complete. Multiple entry points for enemies which are on different sides of the ship makes it too hard to multitask. Feels like the game was made with 2 players in mind. I am certain…”
7 of the 66 reviews raise this · 6 of them still recommend the game.
“A fun enough game...for about eight hours. It's not a BAD game, but for a price of $16, it just lacks content that matches the pricetag.”
“I'm honestly surprised this is getting mixed reviews. Sure, there's not an "endless" amount of content, but what's here is so good, so replayable, so clean. You'll find new ways to play every time you sit down for a few…”
“very short as of early access but what is there is phenomenal and extraordinarily fun.”
4 of the 66 reviews raise this · 3 of them still recommend the game.
“What kinda developer removes 4 player co-op for 2 player instead”
“The game is pretty fun, it's a nice challenge to defend each sector where enemies breach but it does get very overwhelming very quickly. Another issue I have is why is the CO-OP only limited to 2 players? Why not make…”
4 of the 66 reviews raise this · 1 of them still recommend the game.
“Lets talk about what it offers not its potential. Its got potential. The game as is, is not close to finished. Its missing a reason to play. The rougelikeness of the game is not complete. You dont really feel the need…”
“Currently too over-tuned for me to recommend to the average player. Some mutators are so overtuned, you can unload an entire clip into a standard enemy and still not kill them. Due to the level constraints, you…”
“game is solid but it has a lot of problems maps are too open traps dont do enough damage run based nature makes encounters and maps hard to design because you have 0 idea what the player will have enemies will just run…”
Counted across 66 English reviews, sampled to match this game's 82.6% positive rating · as of 2026-05-14
“The gameplay itself is suprisingly fun, a realy fun mix of rouglike and tower defence where the defence does a great job in being intense, forcing you to need to balance between keeping the enemy off the exit and not getting yourself killed with a nice variaty of maps in your…”
— a player, Steam review · 10 hrs played“Fun FPS/Tower Defence mix but ♥♥♥♥♥♥♥♥♥ is it difficult in singleplayer. Probably best to play multi for this so you're not overwhelmed by point management. I enjoy it but it does start to feel unfair when you're swamped by big tanks and fast flying bugs And if there's anything…”
— a player, Steam review · 5 hrs played“If I could give a neutral review I would. I LOVE this genre - combining active gameplay with the usually passive tower defense. Dungeon Defenders, Sanctum 1 and 2, I loved those. I loved grinding in DD with friends, I liked exploring for easter eggs in Sanctum, I like the give…”
— a player, Steam review · 2 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-25. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-10-26). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Updated Translations for 0.91.29842
Hi everyone, we've implemented the translations for the new text that was added in Major Update 5 and the subsequent patch. These are now in build version 0.91.29842 and because the text files are out
Update notes for Build Version Number 0.91.29842
Hi everyone, thank-you for the feedback on the recent launch of Major Update 5. We’ve just released a patch with some general improvements and fixes. The version number is 0.91.29842. If you missed wh
Roadmap Update!
Hi everyone, With the release of our latest Major Update we’re now on the path to Full Release, so we thought it was an appropriate time to update the Roadmap. First, if you haven’t been keeping updat
The Prologue Update
Hi everyone, we’ve released Major Update 5! All the additions and changes are listed below but a quick thank-you to everyone that played the betas and provided feedback – the help is invaluable and gr
MU5 Beta Branch build out now!
Hi everyone, With Major Update 5 approaching we’ve released what should be the final beta branch preview of it. To access version 0.91.29585, you’ll need to switch to a beta branch: Find SENTRY in you
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-14.
| Genres | Action, Indie, Strategy, Early Access |
| Player tags | Tower Defense · Strategy · FPS · Survival · Sci-fi · Action · Colorful · Stylized · 3D · Space · First-Person · Rogue-lite (SteamSpy community voting) |
| Features | Single-player · Multi-player · Co-op · Online Co-op · Custom Volume Controls · Playable without Timed Input · Partial Controller Support · Steam Cloud |
| Languages | English * , French, Italian, German, Spanish - Spain, Japanese, Korean, Polish, Portuguese - Brazil, Russian, Simplified Chinese, Turkish, Ukrainian, Traditional Chinese * |
| Official site | https://sentrygame.com/ |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows 10 64-Bit Processor: 2.4GHz, 4 Cores Memory: 8 GB RAM Graphics: Intel HD Graphics 630 DirectX: Version 11 Storage: 3 GB available space Sound Card: