Portable commercial games list

I wanted to find a list of commercial games that are successfully used as portable, but couldn't find one - so here I go.
Please fill in the list with games and info, and please start separate threads for any posts that isn't adding a game to the list.

Game: Imperialism
Genre: Turn-based strategy
Year: 1997
Wikipedia: http://en.wikipedia.org/wiki/Imperialism_(game)
How to make it work: Just copy an existing installation to the PortableApps-folder