While its output might be limited, most Ubisoft games are classics of their genre. So, if you haven't picked them up yet, the following are now half price on the EU PSN store.
Child of Light £4.79
Lumines ES £4.79
Rayman Origins £5.99
Rayman Legends £7.49
There's also a Resident Evil sale but the new Vita Revelations game doesn't make the cut, but you can pick up the PSone RE 1,2 and 3 bundle for just £4.99. A few more Vita titles on the Digital Discount list.