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Emissary Zero
Co-op horror (1-4 players). You are sent to explore a mysterious building at night. Find the Moon and try to return alive.
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 2026-05-13.
What reviewers agree on
46 of the 104 reviews raise this.
“I played this game with my friends, and we had a great time. It was really scary and atmospheric.”
“I found the game bearable gameplay-wise but I had a bit of a game breaking bug in an elevator leading to me falling out of the map with an important item that couldn't be recovered at the vending machine, softlocking us.”
“So fun! I usually don't play these type of games more than an hour or so, but I found myself harassing my BF to get on and finish out our mission. It was fun looking for the easter eggs and constantly trying not to get…”
37 of the 104 reviews raise this.
“Surprisingly a good time with a buddy, I still couldn't tell you what exactly I just the played. Overall I would tell anyone to get it on sale.”
“I played this game with my friends, and we had a great time. It was really scary and atmospheric.”
“So fun! I usually don't play these type of games more than an hour or so, but I found myself harassing my BF to get on and finish out our mission. It was fun looking for the easter eggs and constantly trying not to get…”
12 of the 104 reviews raise this.
“Amazing game!! I loved the story and the creativity for the monsters! 10/10”
“Didn't expect much for the price but this game is actually good. The atmosphere is creepy as hell and way more fun with friends. I ended this game twice, 1st time i played with friends and second time I played for solo…”
“I don't usually like horror games but this was addicting with friends while still having us scream. I like how if you look close at some of the monsters they reflect the design of the players (spoiler: ..astronauts).…”
9 of the 104 reviews raise this.
“Amazing game!! I loved the story and the creativity for the monsters! 10/10”
“I played this game with a friend and we thoroughly enjoyed it. All the tasks, the story/side stories, and the creepy monsters. Felt like I was actually achieving something grand. Highly recommend this game if you love a…”
“I though this would be another short horror game that me and my mates would complete within 20 minutes, however there is a lot more to it, there a puzzles which are actually good and get your brain thinking, the…”
9 of the 104 reviews raise this.
“Very fun to play with friends. The puzzles are challenging in a good way and the monsters are freaky. We had a very good time with it. I wish it was longer!”
“This game is a ton of fun, especially in multiplayer. Puzzles / Objectives are challenging and the enemies are very unique. Good amount of content as well.”
“It was a pretty interesting game. It took a moment to figure it out at the start, but you get there. The stairway enemy is by far the worst one in the game, lol. Oh, and if you try to find all the Easter eggs, good…”
24 of the 104 reviews raise this · 10 of them still recommend the game.
“the game glitched at the end and my friend with the dynamite glitched out of the elevator so we got softlocked. also the final task felt very overwhelming, and it feels like the dev just kinda gave up with the last…”
“Random and nonsensical. Though the "puzzles" were alright, everything about it is just random for the sake of being random. The enemies also camp stairwells and cramped corridors. Annoying. Why is there a random anime…”
“ходилка в стиле бекрумсов, как и во всех инди такого жанра не хватает механик, но в целом сойдет если у вас есть пати друзей с которыми вы играете 10 лет и ищите разные андеграунды) 6.5/10”
14 of the 104 reviews raise this · 10 of them still recommend the game.
“Surprisingly a good time with a buddy, I still couldn't tell you what exactly I just the played. Overall I would tell anyone to get it on sale.”
“Random and nonsensical. Though the "puzzles" were alright, everything about it is just random for the sake of being random. The enemies also camp stairwells and cramped corridors. Annoying. Why is there a random anime…”
“Very fun to play with friends. The puzzles are challenging in a good way and the monsters are freaky. We had a very good time with it. I wish it was longer!”
10 of the 104 reviews raise this · 4 of them still recommend the game.
“the game glitched at the end and my friend with the dynamite glitched out of the elevator so we got softlocked. also the final task felt very overwhelming, and it feels like the dev just kinda gave up with the last…”
“I found the game bearable gameplay-wise but I had a bit of a game breaking bug in an elevator leading to me falling out of the map with an important item that couldn't be recovered at the vending machine, softlocking us.”
“It's okay for what it is until you hit into every bug either soft locking your character or hard locking your progress because you lost the quest item via death. The proxy voice is too quiet even we had our settings…”
8 of the 104 reviews raise this · 5 of them still recommend the game.
“Pretty solid game, its easier to get lost fast though so make sure your paying attention”
“Its a game. the monsters are a bit buggy and I wont sugarcoat it you will get frustrated. BUT play the game with friends at least 3 in my experience because with friends the game becomes really funny. the mics don't…”
“Very good game. the only thing that I don't like is that it dose not give you a lot of guide trough the levels. but I liked having funny moments with my friends in this game.”
7 of the 104 reviews raise this · 4 of them still recommend the game.
“Random and nonsensical. Though the "puzzles" were alright, everything about it is just random for the sake of being random. The enemies also camp stairwells and cramped corridors. Annoying. Why is there a random anime…”
“Pros: Lady calls you "Sweetie" Cons: Can't date the Lady”
“A fun and creepy playthrough with friends, not a lot of depth or story, but still enjoyable.”
Counted across 104 English reviews, sampled to match this game's 83.7% positive rating · as of 2026-05-13
“After completing this game; there are a few things to note. 1) I wish there was a bit more guide on the missions and or map. The map is faulty and not helpful in the slightest. 2) The mapping of the killers is horrible, they continue to go thru walls and kill us thru walls. All…”
— a player, Steam review · 7 hrs played“Emissary Zero, This game, while it only took me and my friend 5.2 hours to beat it, has been very, very fun. The feeling of fear that was instilled in us throughout the game whether it be getting chased by the Covid Heads, Huey Magoos, or the Moose-Man, all in the quest to free…”
— a player, Steam review · 5 hrs played“Very good game with decent puzzles, and it did give me quite the scare. Did fine at high settings at 1080p even for my older rig.”
— a player, Steam review · 8 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 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 2026-09-05.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. 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 (2026-09-10). 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.
Update 1.3 - Nightmare Difficulty mode
Today marks one year since the game's release!Another difficulty mode has been added: Nightmare.The difficulty has been increased even further. There are no save points. Each terminal used to revive o
Patch 1.2.10
Fixed a bug where infected players weren't dealing damage. Added a setting to select the gamepad type for key mapping.
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Adventure, Indie, Massively Multiplayer |
| Player tags | Horror · Multiplayer · Online Co-Op · Psychological Horror · Co-op · Survival Horror · First-Person · Exploration · Escape Room · Adventure · Action · Puzzle (SteamSpy community voting) |
| Features | Single-player · Multi-player · Co-op · Online Co-op · Shared/Split Screen Co-op · Shared/Split Screen · Steam Achievements · Tracked Controller Support |
| Languages | English, French, German, Spanish - Spain, Russian, Portuguese - Brazil, Turkish, Traditional Chinese, Simplified Chinese, Polish, Korean, Italian, Arabic, Japanese |
| Achievements | 20 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows 10 (64-bit) Processor: INTEL CORE I5-8400 or AMD RYZEN 3 3300X Memory: 6 GB RAM Graphics: NVIDIA GEFORCE GTX 750 Ti DirectX: Version 11 Storage: 5 GB available space VR Support: SteamVR Additional Notes: The system requirements listed above apply to playing on a flat-screen monitor. VR requires higher specifications.