Remove Multiplayer Player Limit

A Slay the Spire 2 mod that increases the vanilla 4-player multiplayer lobby limit. Gather more friends and climb the Spire together!
This mod elegantly increases the multiplayer lobby limit. By default, it perfectly supports 8 players and can be configured to support up to 16 players.









✨ Core Features

• 👥 Expanded Multiplayer: Increases the maximum lobby size up to 16 players (default is 8). Note: Lobbies with more than 8 players may experience rendering errors and UI issues.
• 🏕️ Expanded Campfire Seating: When there are more than 4 players, character models will not overlap. Campfires automatically generate front and back rows, complete with additional background logs for everyone to sit on.
• 💰 Organized Shop Layout: When visiting the merchant with a large group, player models are automatically arranged into neat grids (rows and columns) to prevent crowding and overlapping.
• 🎁 Smart Treasure Room: The relic selection screen automatically scales, intelligently splitting relic slots into two perfectly centered rows when needed.
• 📝 Customizable Limit: Adjust the maximum player count (4–16) directly from the in-game settings screen, under the General tab below the Modding section. The macOS TLS workaround can be toggled via
• ⚔️ Difficulty Scaling: When enabled, monster HP, block, and power amounts continue to scale beyond the vanilla 4-player cap, keeping combat challenging for game. Can be toggled from the settings screen. config.ini.

🎮 Installation
Windows

1. Download the latest  sts2-RMP-.zip from the Releases page.
2. Extract the archive and copy the inner  RemoveMultiplayerPlayerLimit folder to your game directory:  <Slay the Spire 2>/mods/.
3. Launch the game. The mod will be enabled automatically.

macOS (Apple Silicon)
macOS requires placing the mod inside the 
.app bundle and running the game under Rosetta 2.

Note: Some macOS players hit 
unknown ca / 
BadCert errors when joining multiplayer. This mod now enables a macOS-only TLS workaround during multiplayer handshakes. If you need the original behavior, edit 
config.ini to disable the workaround.

1. Download the latest  sts2-RMP-.zip from the Releases page.
2. Extract the archive and copy the inner  RemoveMultiplayerPlayerLimit folder to: <Slay the Spire 2>/SlayTheSpire2.app/Contents/MacOS/mods/
3. Both launch methods below bypass Steam's normal launch flow. To avoid a "Steam failed to initialize" error, make sure the Steam client is running in the background and create a  steam_appid.txt file next to the game executable: echo "2868840" > "$HOME/Library/Application Support/Steam/steamapps/common/Slay the Spire 2/SlayTheSpire2.app/Contents/MacOS/steam_appid.txt"
4. Run the game under Rosetta 2 using one of these methods: Option A — Finder (recommended): Navigate to  SlayTheSpire2.app, right-click > Get Info, and check "Open using Rosetta". Then double-click  SlayTheSpire2.app directly to launch (do not launch through Steam, as it may override the Rosetta setting). Option B — Terminal: Open Terminal and run: cd "$HOME/Library/Application Support/Steam/steamapps/common/Slay the Spire 2/SlayTheSpire2.app/Contents/MacOS"arch -x86_64 "./Slay the Spire 2"
5. The mod will be enabled automatically on launch.

Linux (Ubuntu)
Linux uses the same mod folder layout as Windows, but the game executable and Godot binary names vary by distro/package.

1. Download the latest  sts2-RMP-.zip from the Releases page.
2. Extract the archive and copy the inner  RemoveMultiplayerPlayerLimit folder to: <Slay the Spire 2>/mods/
3. Start the game normally from Steam or your local executable.
4. The mod will be enabled automatically on launch.

Compatibility note: All players must use the same mod version. Local settings may differ safely; only the host's configured limit determines how many players can actually join the lobby.

Linux troubleshooting: If the mod fails during startup with a Harmony / 
mm-exhelper.so error mentioning 
_Unwind_RaiseException, make sure your system runtime libraries are available to the game process. Installing 
libgcc-s1, 
libstdc++6, and 
libunwind8 is usually sufficient.

⚙️ Configuration
Open the in-game settings screen. In the General tab, scroll down past the Modding row — the Max Players paginator lets you adjust the lobby player limit (4–16) in real time.
The macOS TLS compatibility workaround can only be changed by editing 
config.ini manually.
Values are saved to 
mods/RemoveMultiplayerPlayerLimit/config.ini.
Example:

tls_workaround=true

max_player_limit=8
difficulty_scaling=true

Important for upgrading from older releases: If you already have 
mods/RemoveMultiplayerPlayerLimit/config.json from an older version, delete that file once before launching the new build. StS2 scans JSON files in the mod folder as manifests, but 
config.ini is safe.

more info check on Github