Excellent entry! I really love the layout, it is super clear and concise and seems like it would be extremely easy to run. I love the themes and the antagonist, very creepy and also very visual. Great mechanics with the radiation weakness.
The only real criticism I have is that it could really use a "What is really going on" section that just lays out the situation clearly for the Warden. It is relatively easy to get the jist of it with the We section, I was just kind of confused while reading and had to go back to a couple sections occasionally.
Other than that a great entry that I would definitely run. Great Job!
Also a rusty ship named Shackleford, Ha.