Do you have a PSP that can run homebrew?  Do you like zombies?  If you answered yes to those questions then there is a homebrew game that was just posted on Russian blog that you will want to check out.  Its called ZombiesInf2 and you guessed it.  Its all about blowing up and killing zombies.  There are a ton of bug fixes from earlier versions and the gameplay has been updated a lot.  The dev notes that the storyline remains the same but the game has received a lot of updates.  Since the changelog is so long you can view the full log at the source below.  Check out ZombiesInf2 and get your zombie killing fix.

Source