The phrase "perilous mission" means a very dangerous and risky task or assignment.
Sentences with «perilous mission»
It appears Capelli will be defending his boat from impending doom as he makes his away across the US in his most perilous mission yet. (playstationlifestyle.net)
An account of the courageous B - 17 bomber crew that flew more than two dozen perilous missions over Nazi - occupied Europe. (latimes.com)
Only by working together can you complete perilous missions and ultimately steal the plans for the Death Star. (gonintendo.com)