Why is there no new Assassin's Creed game for Vita this year? It's all Assassin's Creed 4's fault, apparently. Ubisoft Sofia, the team that made Liberation, was tasked to help with AC4 instead of making a brand new game for the handheld.

"Liberation actually did very well - we're very proud of it," Black Flag game director Ashraf Ismail explained. "Sales were fairly decent. But the focus for us was Assassin's Creed 4, for current-gen consoles and next-gen consoles.

At last count, Liberation sold over 600,000 copies--not bad, considering Vita's relatively small install base.

However, "from a resource standpoint, the team that worked on Liberation is actually working with us on AC4. They're developing a specific part of the game for us," Ismail told Eurogamer.

It's unclear what Sofia is working on. It's likely they're involved in the PlayStation-exclusive missions, which feature Aveline, the heroine from Liberation. According to Ubisoft, her adventure in Black Flag pick up directly after the end of Liberation and will offer about an hour of new content to explore.