Oh wow, Amnesia Memories is so random, Sony's blog post doesn't even have a link for it. Read my review of the visual novel from 10 months ago instead. Platform adventure Badland is the other game for PS Vita owners, making another pretty sporadic month for those still clinging on to their PS+ subscriptions.
Seriously, Sony should either kill it for the Vita or open up a whole lot of games to make it worth any newbies to think about joining. I gave up a few months back and haven't really missed anything from the back catalogue, and the money saved I could use to buy any PS+ title I particularly miss.