Hi, I looked around a bit and didn't see anything, so I apologize if this has been mentioned multiple times on this forum, but the most recent patch to the 360 version of Defense Grid glitched a number of achievements. After beating The Awakening with all gold medals I unlocked nothing. I had to delete the game from my HDD, clear my cache (remove the update) and then re-download the game; once I did this and then beat any random level/challenge Alien Tears, Planet Defender and Base Defender all unlocked. I've read multiple times of people having the same problem with Master Strategist and this also seems to fix it. Obviously though there is still an issue and I figured at the very least you would want to know about it since I've read about impending DLC and this kind of thing (a patch that causes multiple issues) is the kind of thing that makes people shy away from adding DLC to their game; and since this is a good game I would very much dislike to see that happen.