Card game "21" [purchase]
Bet and Win: Game's cost from 50 gold [purchase]. In case of winning your bet amount gets doubled (besides 10% system's fee) and transfered to your [purchase] account.
Aim of the game: The system gives you 2 cards from the deck, so after that you can display your cards and how many points you got. User has a choice to "take another card" or "open" system's cards. After you click the button "Open" the system takes a card if needed and then displaces the results.
Same results between you and system are defined as a loss.
Card point rating:: Ace - 11 points; King - 4 points; Queen - 3 points; Jack - 2 points; Others due to its par.