The acclaimed Metroid Prime Trilogy is now available on Wii U across Europe and North America, and for the first week Nintendo is offering the digital re-release at half price.The Retro Studios-developed first person adventure games, the first of which GameSpot described as "not just one of the single most atmospheric games ever created, but it's also quite simply one of the best," is available for $10 in the US and £9 in the UK.