You can always get the PC Mac version in their store; they take international orders all the time. If you want the iOS version, there are stores online that sell prepaid US iTunes gift cards. Just be aware of scams and buy from someplace reputable.
I am a community moderator, here to assist, keep the peace, and keep these boards clean and friendly for all. I am a volunteer, and not a Telltale employee, and my opinions are my own.
--Playin' poker with GLaDOS before it was cool--