"You can enter the Giveaway in one of two ways.
1. Purchase the Half-Life 2 Gold Package via Steam by December 31, 2004.
2. Or if you are a United States resident you can enter by sending a postcard marked "Valve HQ Trip Giveaway" to the following address: PO Box 1688, Bellevue, WA 98009. Your postcard must be received by December 31, 2004 and include your full name, birth date, address, phone number and email. Incomplete or late entries will be rejected. "