Here's the whole list - here's what you should care about (I'll link to reviews where I can):
Week 1 - today to Oct 27th:
- Dead Nation (Vita/PS3: $3.19, PS4 $7.59)
- Dead Space 2 $3.89
- Fatal Frame II: Crimson Butterly $4.89 (an absolute classic and still terrifying)
- Plants Vs. Zombies (Vita) $5.39
Week 2 - Oct 28th to Nov 3rd:
- Catherine $6.99
- Corpse Party (Vita) $8.99
- Corpse Party: Book of Shadows $8.99
- Guacamelee: Super Turbo Championship Edition (PS4) $7.34
- I Am Alive $3.74
- Outlast (PS4) $5.00
- Red Dead Redemption: Undead Nightmare $7.19
- Silent Hill: Book of Memories (Vita) $11.99
- Siren: Blood Curse (full game) $7.99 - another full-out classic, and a brilliant horror title.
But wait, there's more! Totally unrelated to the Halloween sale, there's another sale going on that's also got some awesome stuff in it!
- Class of Heroes $7.49
- Knights in the Nightmare $7.49
- Naruto Shippuden: Ultimate Ninja Storm 3: Full Burst $7.49 - I really liked the other Ultimate Ninja Storm game I played.
- Odin Sphere $4.99
- Persona 4 Golden (Vita) $19.99
- Persona 2: Eternal Punishment (PS3) $4.99
- Persona (PSP/Vita) $9.99
- Persona 2: Innocent Sin (PSP/Vita) $9.99
- Persona 3 FES (PS3) $4.99
- Persona 3 Portable (PSP/Vita) $9.99
- Persona 4 (PS3) $7.99
- SMT: Devil Summoner: Raidou Kuzunoha vs. The Soulless Army (PS3) $4.99
- Touch My Katamari (Vita) $8.99
Right now, you can get the PS3 or Vita version for $19.99
Dragon's Crown is a not-bad game that, possibly, doesn't suck.
As for me, I already own every game reviewed above, so I'm considering Naruto, the Personas, and Touch my Katamari.
A Katamari game on Vita would probably be pretty cool... and those Ultimate Ninja Storm games tend to be gorgeous...