As this game is on sale today on Steam, I checked it out and I saw the following message:
The Witcher 2 new & improved version 2.0 coming on September 29th!
What is new on this new & improved 2.0 version?
According to Eurogamer:
A more detailed list of new feature/improvements is available here on PC Gamer.
This content is available for free to all PC customers and it will be the base for the XBox 360 adaptation, in development.
"the free update brings with it technical enhancements, gameplay tweaks and major new features."
"The biggest new features are Dark Mode and Arena. Dark Mode is a new difficulty setting that ups the challenge and adds a number of powerful 'Dark' items. Arena mode is just what you think it is, pitting you against endless waves of enemies while you pick up vital XP."
"A new tutorial has also been added in order to help beginners through the early stages of the game."