Can i buy from amazon.com (US) ?

There are great deals on amazon.com, but they're only available fro us costumers.
If i lie, and say that i live in US, will the keys work on steam?

i want to buy this:
http://www.amazon.com/Sega-Sonic-Action-Pack-Download/dp/B00AG21KGU/ref=sr_1_1?ie=UTF8&qid=1369599276&sr=8-1&keywords=sonic

But im afraid of it. even if i buy it, will the keys be restricted and controlled?