Click the link in the rules section 5c for free entry
Game Instructions: There will be 7,500 random, computer-generated winning times during the Promotion Period. Follow the links and instructions to navigate to the Instant Win Game, play the Game and see if you are a winner. 7,500 Grand Prizes: 2 One-Day Tickets to Six Flags®, terms and conditions apply. Tickets are valid at Six Flags Over Georgia, Six Flags Great America, Six Flags Over Texas, Great Escape, Six Flags Magic Mountain, Six Flags New England, Six Flags Great Adventure, Six Flags Fiesta Texas, Six Flags Discovery Kingdom, Six Flags St. Louis, and Six Flags America. Not valid at water parks, La Ronde, Six Flags Mexico, Six Flags Wild Safari or 3 Park Tickets. Cannot be sold or redeemed for cash. Tickets are valid within the 2012 year only, based on the operating schedules which vary by park. Please visit sixflags.com for a list of parks and operating schedules. You will receive a printable ticket. Printer access is required. Tickets will not be mailed. Approximate Retail Value (“ARV”): $80. Limit: 1 prize per person. Total ARV of all prizes: $600,000.