Underneath a huge list of PS3 games, that rather bizarrely includes Wonder Boy in Monster Land, Sony has tacked on a couple of Vita titles with 25% extra off for PS+ subs as part of a horror-themed sale. Limbo is the most likely pick-up being a class indie game. Obscure is a PSP game that I vaguely remember playing and being a decent shocker adventure.
UPDATE: Sony also has a Cross-Buy sale on for all games that you can play on both Vita and PS3 for one price. Details here but the big guns are Hotline Miami and Guacamelee.
Sale is live now, on a browser anyway, click Choose A Version on the left to pick the sale price.
Was €12.99/AU$18.45/£9.99, now €4.93/AU$7.01/£3.79
Obscure: The Aftermath Was €14.99/AU$21.95/£11.99, now €5.99/AU$8.78/£4.79