SoftUK are selling "Splinter Cell Double Agent" for the Nintendo Wii fro £11.99.
Use the code "Cheap Games" (without quotes) to get free delivery.
You can get cashback via some sites (e.g. 2% Free Fivers, making it £11.75 ). You can also get 6% cashback through SoftUK's 'Collector' program
Next best price seems to be £14.99 ffrom Play.
If it's of interest they also have the original xbox version for £8.99)
Veteran agent Sam Fisher is back. But hes never faced an enemy like this before. To stop a devastating terrorist attack, he must infiltrate a vicious terrorist group and destroy it from within. For the first time ever, experience the relentless tension and gut-wrenching dilemmas of life as a double agent. As you infiltrate a terrorist organization in its American headquarters, you must carefully weigh the consequences of your actions. Kill too many criminals and youll blow your cover. Hesitate too long and millions will die. Do whatever it takes to complete your mission, but get out alive.
* Dual objectives to fulfill: NSA government agents and terrorists will each want you to accomplish opposing tasks at the same time.
* Discover the tension of being a double agent: Use actual tactics employed by todays real-life double agents to sabotage the terrorists plans.
* Explore a branching storyline with multiple endings: Your choices have an impact on how the story and gameplay unfolds.
* A world of international espionage: Missions from all over the world, from Asia to Africa to the heart of the U.S. Experience extreme situations: underwater or in a sandstorm, hiding behind the dust or smoke – and even skydiving.
* New authentic gadgets: Master the latest weapons and gadgets used by NSA government agents in addition to black-market terrorist weapons.