| AlterunaServiceNotStartedException | The exception that is thrown when an operation is attempted within the Alteruna framework but the required Alteruna service has not been started. |
| NoControllerException | Represents errors that occur from missing multiplayer controller. |
| NotInRoomException | The exception that is thrown when a user is not in a room. |
| RoomException | Represents errors that occur during room operations. |
| TransportException | Represents errors that occur with the transport layer of the AlterunaMultiplayer. |
| UserException | Represents errors that occur during user operations. |
| UserIndexArgumentOutOfRangeException | The exception that is thrown when a user index from a argument is not a valid user. |
| UserIndexOutOfRangeException | The exception that is thrown when a user index is not a valid user. |