I'm on the second chapter of the Survival Guide, and I've finished the first two topics (mole rats and mirelurks.) Now I'm on the last one about getting your health below 50%. I've done everything, from jumping off of ledges to going back to Minefield and standing next to a car when it blows up. The main objective always gets completed, but even when I have more than one crippled body part, the optional goal (to have a crippled body part) doesn't. I even tried just going back to Moira and talking to her to see if they would register then, but they never do. Help ?

I usually go in the back room and throw grenades on the floor until I got 1/3rd hp and 3 limbs crippled. I also play on 360 and have never had a problem completing this quest.

I actually figured it out, aha. I healed my radiation and the objective completed when I tried after that. Thank you for your answer. 8))

Lol at least it wasn't some quest breaking glitch...