Updates to Defense Grid have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Defense Grid April 2011 Portal 2 ARG Updates:
  • Two free new and original Defense Grid Levels with new voice acting and story.
  • Portal's GLaDOS invades the network and brings a new style of level design to Defense Grid.
  • New computer console off the main menu. Poke around in the old computer archives, try out puzzles, and learn some DG back-story.Tesla towers now recharge faster and do more damage.
April 13 update:
  • CHAS level is now unlocked for everyone!
  • Recruiting is still important, so keep it up.
  • Tony has one more trick up his sleeveThree more clues to find


More...