Besmirch Multiplayer: 6 Facts About the Unstable Co-op

Besmirch multiplayer exists as an unfinished test, not as a finished default mode. The official Steam store listing currently presents the game as single-player. In Update #10, Gangru Games says that an unstable co-op and multiplayer branch is available for testing, with a playable early stretch, character customization, and several known unfinished sections.

Quick Answer: how do you test Besmirch multiplayer?

TL;DR: Switch Besmirch to the developer's unstable branch through Steam's beta selection, then test co-op on a backed-up or disposable save. The developer specifically asked for feedback during the first two weeks, up to day 16. The branch is described as playable up until winter, but the Town destroyed cutscene, Winter, and the After 3 Days of Darkness sequence still need work. Stable release timing is not announced.

That status matters more than a generic “does it have co-op?” answer. You can test the branch if you want to help find bugs, but you should not promise a polished two-player campaign, a finished join flow, working professions, or a save-safe upgrade path. The official announcement is a testing request, not a multiplayer launch announcement.

The unstable branch includes an early look at player presentation, but its customization systems are still deliberately small.

What is available right now?

Update #10 says the recent multiplayer changes are only available on the unstable branch. It calls the branch “co-op/multiplayer,” says the early section is playable up until winter, and asks for testing especially during the first two weeks, up until day 16.

The same announcement lists character customization as a new change. For now, that means a color choice and a name choice. The developer says the name does not affect anything so far. Custom outfits are listed among the work still being developed, and professions are visible in character customization but not functional.

The stable store page should remain your default expectation: single-player, Early Access, and still under active development. A future stable update may change that, but the sources checked for this guide do not announce a finished co-op release, a final player count, or a final save-conversion policy.

Step-by-Step: test the Besmirch co-op branch safely

1. Finish or pause your stable session: Do not switch branches while the game is saving. If you care about the current farm, close the game normally and make a separate backup before experimenting.

2. Open Besmirch's Steam beta settings: In your Steam Library, open the game's Properties and look for the Betas section. Select the developer's unstable branch if it is still available. The exact Steam label can change, so use the current branch name shown by the client rather than relying on an old screenshot.

3. Treat the branch as a test install: Let Steam finish the branch download, then confirm the branch selection before launching. Keep your stable save backup separate. Earlier unstable-branch notes warn that an unstable build can corrupt a stable save.

4. Start a disposable test save: Test with a new or backed-up farm. Record the branch, game version, number of players, and day reached. That context is more useful than reporting that co-op “worked” without saying which build and section you tested.

5. Test the first two weeks first: The developer specifically asked for bug testing up until day 16. Start with movement, shared progression, interaction prompts, inventory behavior, combat, sleeping, and the transition between day and night. Do not spend your first report chasing the unfinished late-game sequence.

6. Try customization, but do not expect classes: Check the color and name choices, then verify what actually changes in your build. The official note says the name has no effect so far and that professions are visible but not functional. Do not write a class guide from a menu label.

7. Stop before treating the run as finished content: The developer says Winter and the After 3 Days of Darkness sequence still need work, and the Town destroyed cutscene after day 16 needs more work. Save your notes and switch back to stable only after closing the test cleanly.

8. Report reproducible failures: Include the day, branch, player count, action that triggered the issue, and whether it happened again. A short reproduction is more useful than a general report that multiplayer is broken.

The day 16 boundary and late-game gaps

Day 16 is the most useful current test boundary because it is the point the developer names directly. Update #10 asks for especially heavy testing in the first two weeks and says the Town destroyed cutscene after day 16 needs work. That does not mean the branch automatically stops on day 16. It means the developer is flagging that point as a priority for testing.

The announcement also says the branch is playable up until winter, while listing Winter and After 3 Days of Darkness as work still in progress. Read those statements together: the branch can show you the multiplayer direction, but it is not a reliable promise of a complete full-year co-op run.

This is different from the stable game's Three Days of Darkness survival loop. The Besmirch tips guide covers the current survival routine, while this article is about whether that routine remains functional in an unstable multiplayer test. Do not assume that a stable solo result proves the co-op branch has the same timing.

Character customization is not a role system

The first customization pass is intentionally limited. Update #10 says color and name are available, and that the name does not affect anything so far. It also says professions are visible but not functional. That is enough to describe a customization preview, not enough to publish a roster of co-op roles or multiplayer builds.

This distinction protects new players from a common Early Access misunderstanding. A menu label can be a placeholder for future design. Until the developer documents working profession effects, do not claim that one player should choose a healer, farmer, fighter, or any other class. Besmirch's current verified systems are the farm, social pressure, dungeons, survival events, and the new unstable co-op test, not a finished class matrix.

The Besmirch achievements guide is a useful cross-check for what the current Steam completion list actually recognizes. It does not list a multiplayer or profession achievement, which is another reason to keep those features framed as unfinished test content.

A co-op test still has to survive the ordinary house, combat, and night-state transitions that define Besmirch's solo loop.

Save safety and branch discipline

Use the unstable branch like a test environment. Keep a copy of the stable save outside the game's active save folder, label it with the date and branch, and avoid overwriting that copy after launching the unstable build. If the branch behaves normally for one session, that is encouraging but not proof that a later transition is safe.

The earlier unstable update notes explicitly warn that unstable saves can corrupt stable saves. That warning is stronger than any community assumption that Steam will always maintain a perfect branch-specific copy. Back up before switching, test on a disposable file, and return to stable only after closing the game.

The Besmirch Early Access guide explains why the project should be read as a moving target. The developer is still adding monsters, festivals, the Swamp, outfits, and multiplayer work. A later update can change the branch name, the test boundary, or the behavior described here.

What the official sources do not document

The sources checked for this guide do not provide:

• A finished stable multiplayer release date
• A confirmed final player count or complete host and join walkthrough
• A final shared-inventory, progression, or save-conversion rule
• Working profession effects or a verified class roster
• A guarantee that Winter and After 3 Days of Darkness work in co-op
• A promise that the Town destroyed sequence is complete after day 16

Those are legitimate future search topics if the developer publishes them. For the current build, the useful guide is the honest test boundary and branch-safety checklist. A polished co-op strategy guide would overstate what the official announcement confirms.

Frequently Asked Questions

Is Besmirch multiplayer live in the normal branch? The Steam store listing presents the game as single-player. Multiplayer is described in Update #10 as an unstable branch test.

How do I access the test? Use Steam's Properties and Betas settings to select the developer's unstable branch, then start a backed-up test save.

What day should I test first? The developer specifically asks for testing during the first two weeks, up until day 16.

Can I play through winter? The announcement calls the branch playable up until winter, but also says Winter and After 3 Days of Darkness still need work. Treat late-game co-op as unfinished.

Are professions playable? No. The announcement says professions are visible in character customization but not functional.

Will my stable save be safe? Do not assume that. Earlier unstable notes warn that the unstable branch can corrupt a stable save, so use backups and a disposable test file.

Related Reading

• Besmirch Complete Guide: Farming, Horror, and the Baron
• Besmirch Early Access: FAITH-Inspired Farming Horror
• Besmirch Tips: 12 Things to Know Before Your First Night
• Besmirch Crafting and Building Guide: Workbench to Walls
• Besmirch Taxes and Raids: How the New Farm Threat Works
• Besmirch Fishing Guide: Rods, Fishmonger, and Aquarium
• Besmirch Achievements: All 28 Steam Unlocks Explained
• Besmirch Baron Trust System: How It Actually Works
• Subnautica 2 Complete Guide Hub
• Sunderfolk Complete Guide Hub

References

• Besmirch on Steam, official store listing and current stable feature scope, checked September 28, 2026.
• Besmirch Update #10, official unstable co-op announcement covering the test branch, day 16, Winter, customization, and professions.
• Besmirch unstable update #07, official warning and context for unstable-branch testing, building, and save risk.
• Besmirch v0.7 announcement, official current-update context for the game's active Early Access systems.