The reason? The weak pound. Other game companies are also hinting at price hikes for the same reason.
It is certainly true that the weak pound will have pushed up Activision's costs. It should also be noted that a recommended retail price isn't necessarily what retailers will charge.
But at the same time, game development budgets have been soaring for years without a hint of a price rise.
What do you think? Is £54.99 too much or just a unavoidable dose of economic reality?