When it comes to the Ghostbusters game, it seems no platform will be left behind. The ESRB has rated the game for the PSP, pretty much the only platform it hadn't already been announced for thus far.

It could be that this was a typo. If I had to type out the previously-revealed platforms for Ghostbusters - PS3, PS2, Xbox 360, PC, Wii and DS - I might just type out "PSP" as well out of habit. We'll see, though.

It's not clear what studio is developing this supposed PSP version. Development duties for the other versions are split between Terminal Reality, Red Fly Studio, and Zen Studios. Every other Ghostbusters game is coming on June 17th in North America and June 19th in Europe so if this PSP version exists, expect it on that day, too.