Adding a multiplayer function to an existing game environment in unity

Job ID: 33832409

Budget: ₹1,500 – ₹12,500 INR

I have a game developed in unity . I need to add multiplayer function to it . 20 vs 20 , two teams red vs blue it need to developed in unity .
If done successfully many future works are available.
Related categories: iPhone C# Programming Unity 3D Game Development