The Assassin's Creed sequel may not have taken out Call of Duty: Modern Warfare 2 from the top spot on the UK charts, but the game did outperform the original's 2007 debut by 12 percent in unit sales. Although Chart Track doesn't give specific unit sales figures, it's staggering to think that Infinity Ward's FPS dropped 86 percent after its launch week and still retained the top spot. Behind the big boys of violence, Nintendo's New Super Mario Bros. Wii, Wii Sports Resort and Wii Fit Plus took the next three spots, respectively. The hardened Left 4 Dead 2 shambled up to seventh spot. Source -- Call of Duty stands firm [Chart Track] Source -- All formats chart [Chart Track]