Im almost certain it does because when I had my sandisk it kept showing it as a down loadable/buyable game on its game section.
Well most of small sized games like these which are sold through GameHouse, Reflexive, etc store the game's activation details in your Windows Registry, which is checked everytime the game runs, or else it will popup nag screens like "60 minutes left", etc.
So unless you are playing cracked games, the possibility of the game running as full (Activated) version is very less.
thanks every guys.
I seem to find a way to make it portable.
Anyone followed this guide before and if it is true?
portable-launcher.blogspot.com/2010/06/plants-vs-zombies-portable-edition.html
Nice! Thanks for the link!