Not played it myself but at this price I'll give it a go
Enhanced Edition features:
Compared to the initial award winning PC release, the Enhanced Edition features lots of new and exciting content:
Additional hours of gameplay: New major adventures set in previously unseen locations, expanding the story and introducing new characters, mysteries and monsters.
New Game Introduction and cinematics: All new animations and cut scenes, including a new, three and a half minute pre-rendered cinematic depicting the assassination of King Demavend of Aedirn.
BAFTA Award winner and Academy Award nominee Tomasz Baginski brings this key historical event to life, setting the stage for the story told in The Witcher 2.
All of the up-to-date DLC and improvements introduced in the 2.0 version of the PC game, including:
Arena Mode – an arcade mode that allows players to fight against endless waves of enemies and test their combat skills.
Players can share their results with their friends by uploading high scores to the forums or to Facebook .
A new, extensive tutorial system - allows gamers to be gradually and smoothly immersed in the game world and Geralt’s
Dark Mode – a difficulty level designed for hardcore players, with unique dark-themed items. At this difficulty level, even
greater emphasis is placed on battle preparation, defensive maneuvers and opportunistic attacking.
Official soundtrack in MP3 format.
World Map - A map of the game's world.
Quest Handbook - The Witcher 2 quest handbook for both novice and experienced role-playing fans.
Game Manual - A rulebook and interface explanation to help you get started.
Digital Comic Book - Reasons of state comic book