Deadly Premonition is available digitally for $20 and Killer Is Dead for $50. That's especially good news if you've been trying to track down the original version of the former — now a cult hit — without paying too much.
Marvelous Entertainment, which became Marvelous AQL and later joined with Xseed in North America as Marvelous U.S.A., originally published Deadly Premonition in Japan in 2010. Rising Star Games is a more recent handler of the title. It published a Director's Cut for PlayStation 3 earlier this year and is currently working toward a release on PC.
Xseed published Grasshopper Manufacture's Killer Is Dead only last month in North America.