In most of Europe, Gamepass costs several hundred euros. In the USA and Mexico, it's completely blocked. This makes it either expensive or impossible to get, unless you're from the Netherlands where it's absolutely free due to a promotion.
Here's how to make the NFL think you're from the Netherlands, giving you free access.
Short version for experts:
Obtain a VPN/Proxy from the Netherlands.
Enjoy
http://gamepass.nfl.com. You can disconnect your VPN/Proxy any time after beginning the stream.
Long version for newbies:
Go to kepard.com and register an account. You don't need to download the software, and you don't need to pay. (I used an affiliate link in case someone can't read, but there's no need for you to pay)
Click settings (
http://www.kepard.com/personal-vpn-settings/) and under "PPTP" click on your OS.
Follow the instructions, making sure to use this ip 95.211.186.223 for step 5 & 6. The NFL has blocked some of the others.
Connect to the VPN, and ensure that your IP address is from the netherlands by going here:
http://whatismyipaddress.com/
Open a private browser to clear any cookies (firefox: ctrl + shift + p chrome: ctrl + shift + n) and start a stream at
http://gamepass.nfl.com
After the stream begins, disconnect from the PPTP connection you just created. If you don't do this, Kepard will boot you off after you've used your daily 30 free minutes. The NFL only checks your IP to begin the stream, so you'll continue to stream the rest of the game with no problems.