public void Update()

in UnityProject/Assets/Scripts/Server/Server.cs [465:549]
73 lines of code
14 McCabe index (conditional complexity)

    public void Update()
	{
		// Are there any new connections pending?
		if (listener.Pending())
		{
            System.Console.WriteLine("Client pending..");
			TcpClient client = listener.AcceptTcpClient();
            client.NoDelay = true; // Use No Delay to send small messages immediately. UDP should be used for even faster messaging
            System.Console.WriteLine("Client accepted.");

            // We have a maximum of 2 clients per game
            if(this.clients.Count < Server.maxPlayers)
            {
                // Add client and give it the Id of the value of rollingPlayerId
                this.clients.Add(client, this.server.rollingPlayerId);
                this.server.rollingPlayerId++;
                return;
            }
            else
            {
                // game already full, reject the connection
                try
                {
                    SimpleMessage message = new SimpleMessage(MessageType.Reject, "game already full");
                    NetworkProtocol.Send(client, message);
                }
                catch (SocketException) { }
            }

		}

        // Iterate through clients and check if they have new messages or are disconnected
        int playerIdx = 0;
        foreach (var client in this.clients)
		{
            var tcpClient = client.Key;
            try
            {
                if (tcpClient == null) continue;
                if (this.IsSocketConnected(tcpClient) == false)
                {
                    System.Console.WriteLine("Client not connected anymore");
                    this.clientsToRemove.Add(tcpClient);
                }
                var messages = NetworkProtocol.Receive(tcpClient);
                foreach(SimpleMessage message in messages)
                {
                    System.Console.WriteLine("Received message: " + message.message + " type: " + message.messageType);
                    bool disconnect = HandleMessage(playerIdx, tcpClient, message);
                    if (disconnect)
                        this.clientsToRemove.Add(tcpClient);
                }
            }
            catch (Exception e)
            {
                System.Console.WriteLine("Error receiving from a client: " + e.Message);
                this.clientsToRemove.Add(tcpClient);
            }
            playerIdx++;
		}

        //Remove dead clients
        foreach (var clientToRemove in this.clientsToRemove)
        {
            try
            {
                this.RemoveClient(clientToRemove);
            }
            catch (Exception e)
            {
                System.Console.WriteLine("Couldn't remove client: " + e.Message);
            }
        }
        this.clientsToRemove.Clear();

        //End game if no clients
        if(this.server.GameStarted())
        {
            if(this.clients.Count <= 0)
            {
                System.Console.WriteLine("Clients gone, stop session");
                this.TerminateGameSession();
            }
        }
    }