From Super Art Software:
Blackjack (also known as Twenty One) is the most widely played casino banking game in the world. After receiving the initial two cards, you have these options: You can "Hit", "Stand". take Insurance, or Double Down.
Hit: Take another card (as long as you don't exceed 21) Stand: Take no more cards. Insurance: When the dealers face-up card is Ace, you can take an optional insurance - insurance is always half your bet. Double: If the first 2 cards count equals either 10 or 11, then you can double your bet and receive only one additional card.