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).
The first 6 digits of a credit card number are known as the Issuer Identification Number (IIN), previously known as bank identification number (BIN). These identify the institution that issued the card to the card holder. 400115 - Visa Electron Barclays. 400121 - Electron IRL.