Multiplayer is an optional game mode (currently in beta testing) in which 1–4 players can play in the same world over LAN or the Internet. Each player needs their own copy of the game (split-screen isn't supported), but GOG and Steam players can crossplay with each other. The player who created the world has the save file, can launch it in multiplayer mode, and can switch back to single-player anytime. Other players can connect via Steam (non-Steam support is planned but not yet announced).
Multiplayer is mostly identical to single-player. Here are some features specific to multiplayer-only.
The farm can contain up to 3 cabins (selectable during farm creation). For each cabin built, one player can join the farm. If the farm starts with less than 3 cabins, Robin can build more (up to 3 total) on the farm for 100g each. Cabin-building is instantaneous, so extra cabins can be built on the first day.
A cabin can be upgraded at the Carpenter's Shop twice, by the farmhand who occupies it (not by the host or any other player). The final cellar upgrade is not available for cabins. The interior layout of an upgraded cabin is identical to the interior of an upgraded farmhouse, with one exception: the fireplace is replaced by a chest of drawers that holds the farmhand's inventory when the farmhand is not online. This chest of drawers cannot be moved and cannot be accessed by the farmhand who owns it.
When creating a new multiplayer save, you can choose a profit margin of 25%, 50%, 75%, or default (100%). This helps rebalance multiplayer by reducing the gold obtained when selling most items (including crops, forage, minerals, and cooked foods). For example, at 25% profit margin you can sell Wheat for 6g instead of 25g.
Purchase prices for seeds at Pierre's General Store and purchase prices for Grass Starter, Sugar, Wheat Flour, and Rice at JojaMart are scaled as well. Prices for other items (including Blacksmith and Fish Shop shop items, buildings, and tool upgrades) and quest gold rewards are not affected.
This makes gold much harder to come by in the early game; progressing in all your skills evenly, crafting items, and completing Help Wanted quests becomes far more important. For example, Willy still sells Crab Pots for 1500g despite your reduced income, so mining iron and crafting your own may be more economical.
Note that there's no profit margin option when creating a single-player save. However, you can create a multiplayer save by choosing "Co-op" at the main menu instead of "New", then "Load" it in single-player after the save file is created. That will give you a single-player save with your selected profit margin.
- Some decisions are made collaboratively by all players by either clicking dialogues or joining areas:
- when to sleep, by entering a bed;
- when to start a festival, by entering the area;
- whether to finish the Community Center or buy a Joja membership;
- when to pause the game using a /pause command (opening a menu doesn't pause in multiplayer).
- All players share the same money and farmland.
- Each player has their own energy bar, their own Skills, and their own relationships with NPCs.
- Each NPC can only be married by one player. If multiple players want the same spouse, the first to propose will win their hand.
- Interactions between player:
- Players can marry each other and have children. Players propose to each other using a craftable wedding ring. The wedding ring recipe can be obtained at the Traveling Cart for 500g, and will then allow the player to craft a wedding ring with 5 Iridium Bars and a Prismatic Shard.
- Players can dance with each other in the Flower Dance Festival (no prior requirements).
- "4-player Stardew Valley LAN party at my house [...]", ConcernedApe on Twitter, 14 January 2018
- "Drm free copies will be able to play with steam versions, yes!", ConcernedApe on Twitter, 23 March 2018
- "If you are joining someone else's farm, you'll have to make a new character. If you are the one hosting, you can use an existing character (any single player game can be "opened up" to multiplayer at any time)", ConcernedApe on Twitter, 14 March 2018
- Stardew Valley Multiplayer News, Tom Coxon (tccoxon), 01 August 2017
- "They can be ready day 1. They are very cheap (thanks to a Pelican Town Agricultural Subsidy), and the cabins are pre-fab so they build instantly! [...]", ConcernedApe on Twitter, 16 March 2018
- "Unlike single player, time keeps moving when menus are up. The host can do a /pause command, though... then everyone is paused until the host unpauses", ConcernedApe on Twitter, 15 March 2018
- "each player has their own energy bar", ConcernedApe on Twitter, 15 March 2018
- "Nope, it'll be a race for their hand", ConcernedApe on Twitter, 14 January 2018
- "yes" (when asked about players having children), ConcernedApe on Twitter, 16 March 2018
- Status Update: Multiplayer + Beyond, Molly Carroll (mollygos), 08 December 2017