Sony has announced the April Instant Game Collection lineup for PlayStation Plus subscribers on the PlayStation Blog. As with every update since the launch of the PlayStation 4, only one game will be featured for the new generation console, but it’s one that PS4 owners should be excited to get their hands on. Mercenary Kings is the latest 2D send-up from Tribute Games, the team that brought Scott Pilgrim vs. The World to the PS3 and Xbox 360 in 2010. Mercenary Kings pays homage to the 2D shooters of old with challenging enemies and customizable weaponry. PlayStation 3 owners will have access to Batman: Arkham City, Stealth Inc. A Clone in the Dark and Castle of Illusion starring Mickey Mouse.