Released Oct 5, 2026 $7.99 Positive Not counted on Steam profiles yet

Sinever: First Seal

By MAS Studios

Horror Co-op Realistic Psychological Horror Thriller Multiplayer Supernatural Online Co-Op Exploration3DFirst-PersonDark

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Reviews 21 Positive

Players now 0 Peak today 0

Followers, 30 days — Not enough history yet

Sinever: First Seal is a game tagged Horror, Co-op and Realistic by MAS Studios, released Oct 5, 2026. It has 21 Steam reviews (Positive). The Steam games most like it include Lost Lullabies: The Orphanage Chronicles, University 33 and School 666.

Sinever: The First Seal is a 1–4 player co-op psychological horror game. Explore an isolated Victorian estate, operate paranormal equipment, manage your sanity, and uncover the truth behind its imprisoned entity before the house claims you too.

From the Steam page

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<a href="https://launchrivals.com/games/5001350-sinever-first-seal"><img src="https://launchrivals.com/games/5001350/badge.png" alt="Sinever: First Seal launch date" width="320" height="84"></a>

<a href="https://launchrivals.com/games/5001350-sinever-first-seal"><img src="https://launchrivals.com/games/5001350/badge.png?theme=light" alt="Sinever: First Seal launch date" width="320" height="84"></a>

Lost Lullabies: The Orphanage Chronicles 92% match · Horror, Co-op, Psychological Horror
University 33 91% match · Horror, Co-op, Psychological Horror
School 666 91% match · Horror, Co-op, Realistic
Horror Squad 87% match · Horror, Co-op, Realistic
Demonsomnia 86% match · Horror, Co-op, Psychological Horror
Dark Past 85% match · Horror, Co-op, Psychological Horror
Give Us A Sign 85% match · Horror, Co-op, Psychological Horror
Phylakterion 85% match · Horror, Co-op, Realistic
Project Unknown 84% match · Horror, Co-op, Psychological Horror
LockYourDoor 84% match · Horror, Co-op, Psychological Horror

Steam data

Everything Steam lists for Sinever: First Seal · record updated 3 hours ago

Steam store

Overview

App ID5001350

Release dateOct 5, 2026

Last change number40232706

Last record update3 hours ago

App type: Game
Developer: MAS Studios
Publisher: MAS Studios
Steam profile: Not counted yet: Steam is still getting to know this game, so it doesn't add to game counts or achievement totals · checked 22 hours ago
Website: sinever.com

Windows 64-bit

Single-playerMulti-playerCo-opOnline co-opSteam AchievementsFamily Sharing

Prices

Price · US$7.99

On sale0 of 41regions right now

Lowest seen · US$7.99Oct 23, 2026

Checked21 hours agoin 41 regions

Russia₽RUB

Every price change is kept from Oct 23, 2026 on. Pick a region below to compare.

Patches

Build	Branch	Updated
26201574	public	Oct 25, 2026
26163187	public	Oct 23, 2026

Depots

ID	Name	Systems	Size	Download	Manifest
228989	— shared from 228980	Windows	—	—	—
228990	— shared from 228980	Windows	—	—	—
5001351	—	All	5.03 GB	4.67 GB	5211167654663005729

Branch	Build	Updated	Access
public	26201574	Oct 25, 2026	Open

Configuration

Install foldersteamapps/common/Sinever

Executable	Arguments	Systems	Description
sinever.exe		Windows	Play Sinever

Update history

Oct 26, 2026 · 16:22 #40232706
- depots.5001351.manifests.public.download ~~4955801120~~ → 5010072864
- depots.5001351.manifests.public.gid ~~3388201072566049237~~ → 5211167654663005729
- depots.5001351.manifests.public.size ~~5348906457~~ → 5403325825
- depots.branches.public.buildid ~~26163187~~ → 26201574
- depots.branches.public.timebuildupdated ~~1792767019~~ → 1792954087
- depots.branches.public.timeupdated ~~1792767151~~ → 1792954139

Data from public Steam pages, updated daily; 5 days of history. LaunchRivals is not affiliated with Valve or Steam.

Sinever: First Seal

About Sinever: First Seal

Steam data

Overview

App info

Platforms

Features

Prices

Russia₽RUB

Americas 10

Europe 5

CIS 4

Asia-Pacific 15

Middle East & Africa 7

Patches

Builds

Depots

Depots

Branches

Configuration

Launch options

Update history

Changes to the Steam record