Before Dark Souls became a massive success, From Software released Demon's Souls--its bone-crushingly difficult predecessor. PlayStation Plus members will be able to grab it later today as part of this month's update to the Instant Game Collection.
Later in the month, PS3 owners will be able to try Malicious, a brawler focused on Mega Man-style boss gauntlets. Labyrinth Legends also joins the Collection, offering arcade monster-slashing tomb-raiding adventures.
Vita owners will be able to pick up Soulcalibur: Broken Destiny, a PSP spin-off of Soulcalibur IV. Exclusive to the handheld version is God of War's Kratos. Zombie Tycoon 2: Brainhov's Revenge will also be available on both PS3 and Vita.
For videos of all the free games on offer this month, check out the PlayStation.Blog.