Also, you can play versus(and survival, if you get the GOTY edition) offline by selecting join friends, the pressing X to start your own lobby, it tricks the game into letting you play the modes. Why there wasn't just an offline option on the main menu is beyond me.
Visa - Digits two through six are the bank number, digits seven through 12 or seven through 15 are the account number and digit 13 or 16 is a check digit. MasterCard - Digits two and three, two through four, two through five or two through six are the bank number (depending on whether digit two is a 1, 2, 3 or other).
Visa, MasterCard & Discover: Look at the signature strip on the BACK of your credit card. You will find either the entire 16-digit string of your card number OR just the last 4 digits, followed by a space and then a 3-DIGIT NUMBER. That 3-digit number is your CVV2 security code.