According to a Famitsu poll, PS3 Slim's announcement at GamesCom last summer was the biggest news story of 2009.
Full list below, courtesy of Kotaku.
- PS3 Slim announcement
- Final Fantasy XIII dated in Japan
- Dragon Quest IX sells two million in two days
- DSi LL releases in Japan
- The PSPgo is announced
- Nintendo's R4 lawsuit
- PSP-3000's price-cut
- Project Natal's announcement
- Final Fantasy XIV Online's Reveal
- The Last Guardian revealed