It took me a while, but I finally completed Defense Grid with all Achievements.
http://steamcommunity.com/profiles/76561197991088713/stats/DefenseGrid:Awakening?tab=achievements

Once again I feel the need to boost my own ego since I suck so badly at most console games.

By the way, if you haven't heard of this game or given it a shot, it is worth it. I really enjoyed it. Oh, make sure you read the minimum system requirement for ram. Your system will choke and die if you don't have enough. Processor doesn't matter as much.