Two new PlayStation Plus free games will enter the Instant Game Collection tomorrow, April 1.

According to a recent post on US PlayStation Blog, "Mercenary Kings" and "Batman Arkham City" will be the PlayStation Plus free games to enter the Instant Game Collection this week.

"Mercenary Kings," developed by Tribute Games will release for PS4 tomorrow, April 1 and it will be free for the PlayStation Plus members. As posted on Polygon, "Mercenary Kings" was release last week on PC and Mac. In this frantic 2D action video game, players will become part of the Mercenary Kings, which is the "most skilled team of warriors-for-hire on Earth."

According to Polygon, Mercenary Kings was just released this week on PC and Mac. Scheduled to be released on PS4 on April 1, the game will also be free to PS Plus members.

Moreover, "Batman: Arkham City" for the PlayStation 3 is one of the" most critically acclaimed games of 2011." The description on the US PS Blog reads:

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.

Aside from these two PlayStation Plus free games, other 4 titles are scheduled to enter Sony's Instant Game Collection this April. For the PS3 owners, two more PlayStation Plus free games will arrive - the "Stealth Inc.: A Clone in the Dark" developed by Curve Studios and "Castle of Illusion Starring Mickey Mouse" from Sega Studios Australia.

PS Vita gamers can grab their own copy of "PixelJunk Monsters: Ultimate HD" which was ported by Double Eleven, as well as "Velocity Ultra" from FuturLab as PlayStation Plus free games this April.

Moreover, for the Spring Sale this week, a number of Spider Man titles are available for a discounted price. Check out the list below:

The Amazing Spider-Man (PS3)

The Amazing Spider-Man DLC Bundle

The Amazing Spider-Man Lizard Rampage Pack

The Amazing Spider-Man Oscorp Search and Destroy

The Amazing Spider-Man Rhino Challenge

The Amazing Spider-Man Stan Lee Adventure Pack

The Amazing Spider-Man (VITA)

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