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What is Unmoddable?
Unmoddable is a directory site that catalogs mods which change how many people can play a game — chiefly multiplayer or co-op mods for games that shipped as single-player, plus the reverse (single-player mods for multiplayer titles), self-made tools, and modding tutorials.
What you'll find there
Each entry is a mod listing with a short description of what it does and how it works. From the site's own listings:
- Clair Obscur: Expedition 33 Online Expedition — adds real-time multiplayer to the RPG, with friends appearing as animated players in the world and joining cooperative battles.
- Graveyard Keeper 2 Multiplayer Mod — online co-op for up to eight players sharing one world, with separate characters, inventories and progression.
- CardShopCoop — a co-op mod for TCG Card Shop Simulator, a shop-management sim.
- Hades Co-op Mod — local and online two-player co-op, with local split controls and Steam Remote Play support.
- Rain Meadow — a Rain World multiplayer/co-op mod covering Story mode, Arena battles and the Meadow mode.
- MegabonkTogether — up to six players over peer-to-peer netplay, synchronizing enemies, weapons, projectiles, chests, shrines, portals and progression.
- Dark Messiah: Co-op — turns the single-player campaign into a cooperative run with shared campaign saves and persistent skills.
Who it's for
Two kinds of readers get the most out of it. The first is someone who finished a single-player game and wants to replay it with a friend, but doesn't know whether a working mod exists. The second is a modder looking for prior art — how other projects handled save sharing, progression, or netcode — or for tutorials.
How to use it
Treat it as an index, not a storefront. Before installing anything, check the mod's own page for the game version it targets, since co-op mods are usually tied to specific patches and break when the base game updates. Practical checks:
- Does the mod support online play, or only local/split-screen and Steam Remote Play? The difference decides whether you need everyone to own the game.
- Is progression shared or per-player? Graveyard Keeper 2's per-player inventories suit drop-in sessions; shared campaign saves like Dark Messiah's suit a fixed group playing through together.
- How many players, and over what connection? Peer-to-peer hosting, as in MegabonkTogether, usually means the host's connection determines stability.
If you want a starting point, pick the game you already own from the list, read its entry, then follow through to the mod's own download page for installation steps and compatibility notes.
Which singleplayer games have multiplayer co-op mods available on Unmoddable?
Unmoddable catalogs fan-made co-op mods that add multiplayer to games designed for one player. Its listings cover several well-known singleplayer titles, each with a mod that introduces online or local cooperative play.
Singleplayer games with co-op mods listed
- Clair Obscur: Expedition 33 — an "Online Expedition" mod adds real-time multiplayer, lets friends appear as animated players in the world, and supports cooperative battles.
- Graveyard Keeper 2 — a multiplayer mod brings online co-op for up to eight players sharing one world, with each player keeping their own character, inventory and progression.
- Hades — a co-op mod adds local and online two-player play through the Underworld, with local split controls and Steam Remote Play support.
- Rain World — the Rain Meadow mod supports online co-op in Story mode, Arena battles, and a peaceful exploration mode.
- Megabonk — MegabonkTogether adds online co-op for up to six players over peer-to-peer netplay, synchronizing enemies, weapons, projectiles, chests, shrines, portals and progression.
- Dark Messiah — a co-op mod turns the original singleplayer campaign into a shared adventure, with shared campaign saves and persistent character skills.
The site also lists the reverse case — multiplayer games given singleplayer mods — plus self-developed tools and modding tutorials, so it functions as a directory rather than a single mod's home.
How to choose
Start with the game you already own, then check the mod's player count, connection type (peer-to-peer, Steam Remote Play, or dedicated), and whether progression is shared or per-player. A mod like Graveyard Keeper 2's, which keeps inventories and progression separate, suits friends who play at different paces; a shared-campaign mod like Dark Messiah's suits a group moving through the story together. Compatibility with the current game version is the usual dealbreaker, so confirm that before installing.
How do I install a multiplayer mod for a singleplayer game like Clair Obscur: Expedition 33?
Installing a multiplayer mod for a singleplayer game follows a fairly consistent pattern, but the exact steps depend on the mod. For something like Clair Obscur: Expedition 33, the Online Expedition mod adds real-time multiplayer so friends can explore Lumière together and fight cooperative battles, which means both players typically need matching game versions and the same mod build.
The general install sequence
- Back up your save files. Multiplayer mods sometimes alter save structure, and co-op sessions can corrupt a save if versions mismatch. Copy your save folder somewhere safe before touching anything.
- Check the game version the mod targets. A mod built for one patch often breaks after an update. Note your game's version number and compare it to the mod's stated compatibility.
- Install a mod loader if required. Many co-op mods depend on a framework (BepInEx, MelonLoader, or a game-specific loader) rather than dropping files directly into the game folder. Read the mod's own instructions first, since this is the step people most often get wrong.
- Place mod files in the correct directory. Usually this is the game's install folder or a
plugins/modssubfolder. Don't guess; follow the mod page's path exactly. - Verify the mod loads. Launch the game and look for a mod menu, version stamp on the title screen, or console output. If nothing appears, the loader isn't finding the files.
- Match versions with your co-op partner. Both players need the same mod version and ideally the same game patch. A mismatch is the most common cause of failed connections.
- Connect through the mod's own method. This might be a direct IP join, a lobby code, or Steam Remote Play. The Clair Obscur mod, for example, is designed around cooperative play rather than the base game's single-player flow.
What to expect from co-op mods generally
| Aspect | Typical reality |
|---|---|
| Save compatibility | Often shared or synced, sometimes with separate inventories per player |
| Player count | Varies widely; some mods support two players, others up to six or eight |
| Stability | Usually less polished than native multiplayer; expect occasional desyncs |
| Updates | Mods lag behind game patches, so a game update can temporarily break co-op |
A concrete scenario
Say you and a friend both own Clair Obscur: Expedition 33 and want to play through it together. You'd each install the same mod version, confirm your game builds match, launch through the mod's connection method, and keep a backup save in case a session desyncs. If one of you updates the game before the other, co-op will likely fail until both are on the same version.
For mod listings, tutorials, and tools covering this kind of conversion, Unmoddable collects multiplayer mods for singleplayer games and the reverse. For the mod loader itself, check the official GitHub page of whichever framework the mod requires, since that's where version-specific install notes live.
The single most useful decision criterion: if the mod's page doesn't clearly state a supported game version and a co-op partner requirement, treat it as experimental and test with a throwaway save first.
Can I play a multiplayer game like Hades in singleplayer with mods?
Yes — but the direction matters. Hades is already a singleplayer game, so what you'd add is co-op, not remove multiplayer. If your question is really "can I take a multiplayer-first game and play it solo with mods," that's a different and much less reliable project.
The Hades case specifically
Unmoddable lists a Hades Co-op Mod that adds local and online cooperative play for two players, with local split controls and Steam Remote Play support, described as making minimal changes to the base game. So the practical use is: you own Hades, you want to run the Underworld with a friend, and you install this on top of the existing singleplayer game. Nobody is losing solo play — co-op is the addition.
That distinction is worth holding onto, because "play multiplayer games in singleplayer" is often asked as if mods could strip out required matchmaking, servers or other players. Mods can sometimes substitute AI, unlock private lobbies or bypass queues, but that depends entirely on the game's architecture, and a mod that fakes other players rarely reproduces the real experience.
What to check before installing anything
- Does the mod change the base game or sit alongside it? Minimal-change mods are easier to remove and less likely to break saves.
- Local or online? Local split-screen needs no accounts or netcode; online play depends on the mod's own networking, which can be fragile across versions.
- Version matching. Game updates frequently break mods, especially ones touching netcode or progression.
- Save compatibility. Co-op mods that share campaign saves can leave your solo save in an unexpected state if you later uninstall.
- Whose observation is it? Mod pages describe intended features, not guaranteed stability on your setup.
If your real goal is solo play in a multiplayer game
Look for official bots, private lobbies or offline modes first — they're more stable than mods. Mod-based solutions are worth trying when the community around that specific game is active and the mod has recent updates. Unmoddable is a reasonable starting point because it catalogues both directions: multiplayer mods for singleplayer games and singleplayer-oriented mods for multiplayer games, plus its own tools and tutorials.
Next step: decide which direction you actually want. If it's "play Hades with a friend," the co-op mod above is the direct answer. If it's "play a multiplayer game alone," name the specific game and check whether its community has an offline or bot mod with recent activity — the answer varies game by game, and no general rule covers it.
Where can I find modding tutorials and self-developed tools on Unmoddable?
Unmoddable is a directory-style site that catalogs multiplayer mods for singleplayer games, singleplayer mods for multiplayer games, and related tools and tutorials. Its own description states that it tries to list modding tutorials and self-developed tools alongside the mod listings, so the tutorials and tools are not a separate product or storefront — they sit within the same catalog as the game mods. The page evidence shows the mod entries clearly (for example Clair Obscur: Expedition 33 Online Expedition, Graveyard Keeper 2 Multiplayer Mod, CardShopCoop, the Hades Co-op mod, Rain Meadow, MegabonkTogether, and Dark Messiah: Co-op), which tells you the site is organized around individual mod pages rather than a single "learn modding" course.
How to actually find them
- Start from the site's own navigation and look for category or tag links rather than browsing mod pages one by one. The listed keywords include 教程 (tutorial), which suggests tutorial content is grouped as a topic.
- Use on-site search for terms like "tutorial," "tools," or "modding" instead of game titles, since the catalog is dominated by game-name entries.
- Check the site's own description text for the tools/tutorials section it says it maintains, then follow that section rather than the mod feed.
What to expect when you get there
Tutorials on a site like this are usually practical, mod-specific write-ups: how a given co-op mod is installed, how saves or progression are handled, or how netplay is configured. Self-developed tools tend to be the utilities the site's authors built to support their own mods. That is useful if you want to understand how a specific listed mod works, but it is a different resource from a general game-modding curriculum.
A concrete scenario
Say you want to play Hades cooperatively and also understand what the mod changes. You would read the Hades Co-op mod entry for the feature description (local split controls, Steam Remote Play), then look in the tutorials/tools area for installation and troubleshooting notes. If the tutorial section is thin for that game, treat the mod page as the primary documentation and the tutorial area as supplementary.
Decision criterion
Use Unmoddable's tutorial and tools area when you want guidance tied to a specific mod in its catalog. If you need broad, engine-level modding instruction — Unity, Unreal, or general asset pipelines — a dedicated modding community or the game's official modding documentation will serve you better, because a curated mod list is not built to teach modding from scratch.
A useful next step: open the site, locate its tutorials/tools section from the main navigation, and search within it for the exact game you care about before downloading anything.
How do co-op mods handle game progression and saves when playing with friends?
Co-op mods generally fall into two camps: shared progression, where the whole group advances one save together, and per-player progression, where each friend keeps their own character, inventory and unlocks while sharing the same world. Which model a mod uses decides almost everything about how you schedule sessions and who hosts.
Shared saves vs. per-player progress
- Shared campaign save. The group plays one world and one story state. Everyone must be present for meaningful progress, and a skipped session means falling behind. Dark Messiah: Co-op is described as sharing campaign saves and persistent character skills across the story, so the group's state is effectively one file.
- Per-player progress in a shared world. Each player keeps their own character, inventory and unlocks. Graveyard Keeper 2 Multiplayer is described this way, with up to eight players in the same world working on construction together. This is friendlier to irregular schedules: someone can drop in, contribute, and leave without holding back the story.
- Host-owned world. Some mods are peer-to-peer, meaning one player's machine runs the session. MegabonkTogether is described as peer-to-peer netplay for up to six players, synchronizing enemies, weapons, projectiles, chests, shrines, portals and progression. In practice, the host's world is the world; if the host isn't around, nobody plays that save.
Practical differences at a glance
| Model | Who owns progress | Best for | Main trade-off |
|---|---|---|---|
| Shared campaign save | The group as one save | Committed groups playing a story start to finish | One absent player stalls progress |
| Per-player character, shared world | Each player individually | Drop-in groups with uneven schedules | Group goals can drift; world state still needs a host |
| Peer-to-peer session | The host's machine | Small groups, quick sessions | Host dependency and connection quality |
What to check before you start
- Progression model. Look for wording like "shared campaign saves," "persistent character skills" or "players keep their own inventories." That single sentence tells you how to plan sessions.
- Player cap and sync scope. A mod that syncs enemies, loot and quest state behaves very differently from one that only syncs player positions.
- Connection method. Local split-screen and Steam Remote Play, as described for the Hades Co-op mod, avoid hosting headaches but tie you to one screen or one account.
- Back up saves first. Mods that write to a shared save can corrupt it if versions mismatch between players. Copy the save folder before the first session and after each major milestone.
A useful rule of thumb: if your group can reliably meet at the same time, a shared-save mod gives the most coherent experience; if schedules are messy, prefer a mod where each player keeps their own character and progress. Browsing the mod list at Unmoddable is a quick way to compare these descriptions side by side before committing to a campaign.
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