The first time Eight Days made an appearance was during an unofficial tech demo at Sony's E3 2005 conference. But it wasn't officially announced until the 2006 E3 showing. Not much was known about the game aside from it being your typical mob chase game, with some wicked explosions.
It wasn't the ambiguity or mixed reviews that played a hand in the game ultimately being nixed. Pre-production alone cost the company a pretty penny, and with the game still needing to be finished and other exclusive first party titles coming out, Eight Days bit the bullet.