As I commented on your other post, there are two possibilities; either the universe is murphy-like and pessimizing your outcome, in which case sure, you might be in a worst case universe, and there is a bound on how well you can do, or some agent sent the rock, in which case you are playing the game against that agent, and would know that fact. Or, as I mentioned, yes, an ultrapowerful system can create situations where you lose because it can fool you, lying to you perfectly, and that is equivalent to a worst-case universe.
As I commented on your other post, there are two possibilities; either the universe is murphy-like and pessimizing your outcome, in which case sure, you might be in a worst case universe, and there is a bound on how well you can do, or some agent sent the rock, in which case you are playing the game against that agent, and would know that fact. Or, as I mentioned, yes, an ultrapowerful system can create situations where you lose because it can fool you, lying to you perfectly, and that is equivalent to a worst-case universe.