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ZERO PROTOCOL
In this immersive sci-fi thriller, you will experience the atmosphere of classic 3D games as you solve puzzles, follow an intriguing non-linear storyline, and engage in battles with monsters.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-04 · quoted reviews as of 2026-05-15.
“Overall, this game is something I would recommend but with keeping it in mind that it's a very fast game. You can probably beat the game in about 1-2 hours once you know what to do. I got about almost 3 hours out of it. I will replay to 100% it since there are multiple endings…”
— a player, Steam review · 5 hrs played“First impression after ~1 hour: ZERO PROTOCOL is a "System Shock" clone with okay graphics, okay writing, okay puzzle mechanics, and some okay enemy encounters. It's not an unforgettable experience, but a simple and entertaining, well-polished indie horror exploration and puzzle…”
— a player, Steam review · 1 hrs played“At first, this game seems pretty ordinary, but the longer you play, the more interesting it becomes. From the puzzle mechanics to the story, everything makes the game increasingly engaging. Even though the graphics are pixel based, the horror atmosphere is still very effective.…”
— a player, Steam review · 5 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-01 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-19.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-08-12. 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 (2026-09-25). 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.
Waterpunk: Through the Rust. The demo is now available!
https://clan.akamai.steamstatic.com/images/42649836/90e938c09b2461489ac273fe8d43793e8e6fac3b.png I am pleased to announce that the demo version of my new game, which I have been working on for about a
Update v. 1.2
A new, fifth ending has been added! Although ZERO PROTOCOL is a small game, you’ve always been able to finish it with different outcomes. Now there’s one more possible outcome! A short description has
A new game in development!
https://clan.akamai.steamstatic.com/images/42649836/7d40a91433eb9ee45dc061d9caa381fa2434e35b.png I’m pleased to announce that I’ve been working on a new project for almost half a year! Waterpunk: Thro
Update v. 1.05
- The problem with rendering on modern AMD RX graphics cards has been solved. - The "RENDERING MODE" parameter has been removed. - Added FOV setting. - Fixed a bug where padlocks became immune to shot
Update v. 1.04
Please note that if you previously selected an alternative rendering mode in the settings, you will need to do so again after the update. It is also recommended to restart the current level. List of c
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-15.
| Genres | Action, Adventure |
| Player tags | Survival Horror · Atmospheric · Psychological Horror · First-Person · Exploration · Story Rich · Multiple Endings · Puzzle · Stylized · Sci-fi · FPS · Shooter (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud · Family Sharing |
| Languages | English, Russian, French, German, Spanish - Latin America |
| Controller | Full support |
| Achievements | 14 |
| Official site | https://purmalis.ru/zero-protocol.htm |
Minimum system requirements (PC)
Minimum: OS *: Windows 7 or newer Processor: Intel Core i3 Memory: 2048 MB RAM Graphics: 512 MB graphics card with WebGL support