You knew this was going to be a hard mission, but you got the worst of it; while your team distracts the soliders and cripples infrastructure, your job is to go right into the eye of the storm, where you're going to confront the matriarch of this entire species and kill her. You gear up, taking armor and ammunition to spare, and head down. The operation is already underway, and you've been beamed right up to what serves as the throne room.
The area is a huge hive, built by creatures that have more in common with wasps than humans. You've caught the queen alone with a few million eggs about her. There's no room to hesitate; you open fire immediately, blasting a hole through the giant queen. You fire again and again, perforating her, but she's still moving. In one last attempt to save her children, she strikes out with her stinger, piercing your armor like so much paper. The two of you watch each other die.