Valkyria Chronicles skyrockted 400 percent from March to April. The site states the game is now in "tens of thousands" of brand new homes. The sales spike was likely a confluence of post-holiday word-of-mouth, a temporary price drop, the addition of DLC and some evangelical moments by outlets to get at least one Sega franchise out of the rabid blue hedgehog's shadow.
The Sega site fully recognizes that a quadrupling of sales for a game six months after launch is not exactly the norm. Hopefully this means Valkyria Chronicles isn't a full-blown flop anymore in North America and its possible sequel may actually make it across the Pacific.