# TabletopNetworkSession An object that coordinates network-related tasks in multiplayer games. ``` class TabletopNetworkSession where Coordinator : TabletopNetworkSessionCoordinator ``` ## Overview To start a multiplayer game for a local player, use the [`start()`](/documentation/TabletopKit/TabletopNetworkSession/start()) method. TabletopKit syncs the current table state between all peers in the session, so update the table state before invoking this method. After invoking the [`start()`](/documentation/TabletopKit/TabletopNetworkSession/start()) method, the local player becomes the arbiter who ensures that TabletopKit applies actions in order for all players. To switch the arbiter role between players, use the [`becomeArbiter()`](/documentation/TabletopKit/TabletopNetworkSession/becomeArbiter()) and [`followArbiter(_:)`](/documentation/TabletopKit/TabletopNetworkSession/followArbiter(_:)) methods. To join an existing game, use the [`join()`](/documentation/TabletopKit/TabletopNetworkSession/join()) method, and to pass incoming messages to the game, use the [`processIncomingMessage(_:from:)`](/documentation/TabletopKit/TabletopNetworkSession/processIncomingMessage(_:from:)) method. To get all the people who join the session, not just the players, use the [`peers`](/documentation/TabletopKit/TabletopNetworkSession/peers) property. ## Topics ### Joining multiplayer games [`start()`](/documentation/TabletopKit/TabletopNetworkSession/start()) Start a new multiplayer game, promoting the local state of the table to all connected peers [`join()`](/documentation/TabletopKit/TabletopNetworkSession/join()) Join an existing game started between the connected peers [`leave()`](/documentation/TabletopKit/TabletopNetworkSession/leave()) Leave the current multiplayer game [`terminate()`](/documentation/TabletopKit/TabletopNetworkSession/terminate()) ### Changing the arbiter role between players [`becomeArbiter()`](/documentation/TabletopKit/TabletopNetworkSession/becomeArbiter()) [`followArbiter(_:)`](/documentation/TabletopKit/TabletopNetworkSession/followArbiter(_:)) ### Managing network session peers [`peers`](/documentation/TabletopKit/TabletopNetworkSession/peers) The set of peers known by the game [`addPeer(_:)`](/documentation/TabletopKit/TabletopNetworkSession/addPeer(_:)) Notify the game that a new peer has connected [`removePeer(_:)`](/documentation/TabletopKit/TabletopNetworkSession/removePeer(_:)) Notify the game that an existing peer disconnected [`Peer`](/documentation/TabletopKit/TabletopNetworkSession/Peer) ### Receiving messages from peers [`processIncomingMessage(_:from:)`](/documentation/TabletopKit/TabletopNetworkSession/processIncomingMessage(_:from:)) Pass incoming messages from the reliable channel to the game. [`processIncomingUnreliableMessage(_:from:)`](/documentation/TabletopKit/TabletopNetworkSession/processIncomingUnreliableMessage(_:from:)) Pass incoming messages from the unreliable channel to the game. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)