Sony has added a PSP echochrome expansion to the US PlayStation Store.
Inside the USD 4.99 pack are 40 extra levels of brain twisters - around 71 per cent more content than in the original. And those without echochrome can expect a game-plus-expansion bundle to save a few pennies.
However, these extra levels are not available on the PAL PlayStation Store, so fans will need to digitally travel to America for the content.
Still, we did get a rather meaty PSN update yesterday, which included a Valkyria Chronicles demo, tons of Rock Band songs, plus various extras for games.