PaRappa the Rapper 2 is the latest PS2 game to be made available on PlayStation 4.
Sony has been selling emulated PlayStation 2 games on PlayStation 4 for a few days now. The first batch included Dark Cloud, GTA 3, GTA: Vice City, San Andreas, The Mark of Kri, Twisted Metal: Black and others.
We've been told PaRappa the Rapper 2 will follow suit soon, and during the PlayStation Blogcast podcast, it has been confirmed that it'll launch on Tuesday, December 15.
There was no talk of price, there's no reason to think it will cost over $15.
PaRappa the Rapper 2, which came out in 2001, and its prequel are considered among the first titles to do rhythm-action games on consoles.