At Microsoft's E3 2011 keynote today at the Galen Center, Halo 4 was officially announced -- surprise! Master Chief and Cortana are back (kicking off a new trilogy, apparently), the brief teaser trailer showed. 343 Industries is at the reigns with a Holiday 2012 launch date proposed.
Update: Hit the jump for the teaser!
This article was originally published on Joystiq.
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