The April line-up for PlayStation Plus has been detailed, and it includes (as usual) one new PS4 game, and a variety of awesome PS3 & Vita games. Noteworthy additions include Batman: Arkham City, Castle of Illusion, and PixelJunk Monsters HD.

PlayStation 4

Mercenary Kings

In this frantic 2D action game, you are part of the Mercenary Kings, the most skilled team of warriors-for-hire on Earth, but when your comrades have fallen and the fearsome forces of CLAW have seized an island-wide top secret Laboratory Base, you must do what it takes to stop them. But you're not going in unprepared! Your back-up is made of a crew of rogue geniuses and experts of their field! Able to craft & customize guns'n'blades or upgrading body armor, you've never been this ready to join the fight.

PlayStation 3

Batman: Arkham City

No escape from Arkham City...the sprawling super-prison in the heart of Gotham City, home to its most violent thugs and infamous super villains. With the lives of the innocent at stake, only one man can save them and bring justice to the streets of Gotham City...The Batman.

Stealth Inc. A Clone in the Dark

Stealth Inc is a fast-paced stealth platformer featuring brutal hazards, ruthless enemies, fiendish puzzles and red pixels galore. Jump, sneak, and be chunked through 80 levels. Will you make it out alive? Armed with only your wits and a pair of top of the range Stealthing Goggles, it's your job to sneak your way through a deadly facility that's determined to extinguish your fragile little life. With no weapons and no armour, being seen means instant death.

Castle of Illusion Starring Mickey Mouse

Mickey Mouse returns to star in Castle of Illusion, a fantastical re-imagining of the Sega Genesis classic. With all-new HD graphics and gameplay, Castle of Illusion brings Mickey and his world to life in this magical Disney adventure! When the evil witch Mizrabel kidnaps Minnie, it’s up to Mickey to brave the dangers of the Castle of Illusion to rescue Minnie. Gather your courage and traverse enchanted forests, take on hordes of rebellious toys and navigate mazes of living books. Play as Mickey and save Minnie from Mizrabel’s evil clutches!

PS Vita

Velocity Ultra

Featuring a new anime-influenced art style, touch screen to teleport, bombs on right stick, explosive visual effects, a Platinum trophy and PlayStation Trophy Leaderboards, Velocity Ultra improves on the 2012 Game Of The Year and PSN Gamers' Choice Awards release in every area (except music 'cos that rocked the first time around).

Pixeljunk Monsters Ultimate HD

Tikiman the Forest Defender is in trouble. Hordes of monsters are sweeping through his realm, hoping to chow down on his offspring – and it’s up to you to defend them. By placing weapon towers at strategic points around the landscape, you can destroy the invaders and save the little ones. Collect treasure along the way to build up your arsenal and pay for new towers – countless waves of monsters are out to get the babies, so you need to be prepared to battle!