Attached is a sample project that is a multiplayer black jack card game written using the UNet HLAPI. It uses the Unity UI system, but the user interface is very primitive. It is missing some features, such as "spit" and "double down", but the game is functional multiplayer blackjack. There is a CardManager object in the scene that handles the game turn states and which player's turn it is. There are Player objects for each player. There is a special player object for the dealer - which not associated with a client. Players use commands to perform actions on the server such as "Hit Me". Each player has an attached "playerPanel" UI object that holds their cards. There is a button panel on the right that has buttons that enabled based on the current player and turn state. The cards themselves are not networked game objects, they are just structs that identify the particular card. This is of course not the only way to make a card game with Unity, but hopefully it will serve as a useful framework.