Original sentence: Before each mission, you are given a briefing which gives details on destroying a certain number of targets
Edited sentence: Before each mission, you are given a briefing, but these sometimes have little to do with the stages, themselves.But in another, you are told the enemy has converted a medieval castle into a fortress, and you must destroy it.But, you never actually see, let alone destroy, a castle.In one scenario, you are told that the enemy has amassed a fleet of battleships, and you have to destroy all of them.No matter what the briefing tells you, your mission is to always destroy a certain number of targets, either on air, ground, or both.That makes sense enough.This makes the story feel irrelevant