Tuesday's PS Plus update also brings Killzone Mercenary beta access.
This week's US PlayStation Plus update will add two Vita-compatible titles to the Instant Game Collection.
Zen Pinball 2: Star Wars Pinball and Darkstalkers Chronicle: The Chaos Tower will be free to US PS Plus subs from tomorrow, August 20.
As previously announced, US PS Plus subs will also get early access to the Killzone Mercenary multiplayer beta. Regular users won't get access until August 27.
Tomorrow's PS Store update will also mark the start of week two of the PS Vita Japanese Game Sale, with games including Street Fighter X Tekken, Dead or Alive 5 Plus and Metal Gear Solid HD discounted.
Here's the full list: