Rumoured sequels to Left 4 Dead, Portal and Half-Life aren't being announced just yet.
This'll just be a quickie. Valve Corporation have today confirmed that they will only be showing their currently announced video games- so that's DOTA 2 and Counter Strike: Global Offensive- at this year's Electronic Entertainment Expo. That means that the big franchise sequels of Portal 3, Half-Life 3 and Left 4 Dead 3 that have been constantly speculated on by fans recently won't be shown in any format, a real shame considering Half-Life have been waiting for nearly a decade for the sequel to Episode Two. Still, we can expect more from Valve on their new projects via the Spike Video Game Awards (sure to hold a new trailer reveal from them?) and definitely the Game Developers Conference. E3 2012 will be held from June 5th-7th.