If you were to tell me that your Uncle Who Totally Works At Sega said that Valkyria Chronicles 4, the latest game in the tactical role-playing franchise, was actually developed in 2009 as the original sequel to 2008’s Valkyria Chronicles, and then locked up in a vault for ten years before finally being released this month, I would believe you. Sure, I’d be suspicious because the game is called Valkyria Chronicles 4 and not 2, but your case would otherwise be convincing.
Valkyria Chronicles 4 is absolutely a sequel to Valkyria Chronicles 1, for better…and for worse.
Source: Destructoid Review: Valkyria Chronicles 4