Successfully complete one of the following tasks to get a trophy:

Pod Oppressor (Bronze): Destroy 10 mutated pods in any one level of Training 
Grounds. 
Spidery Point (Bronze): Destroy the Spider Boss on Arachnophobia. 
Tank Oppressor (Bronze): Destroy 20 tanks in sequence. 
Tank Sympathizer (Silver): Destroy both generators on Claustrophobia without 
killing a Tank. 
Fly Swatter (Silver): Destroy 3 Flypods within 5 seconds on any level of 
Insect Infestation. 
Sneeky Incursion (Silver): Destroy the Boss without opening more than one 
outer door. Only 1 of the 3 outer doors may be opened to any degree. 
Worm Tangle (Gold): Destroy 3 Worms in sequence on The Ooze. 
Wheel Collector (Gold): Complete level Fizz Wheels without killing a Fizz 
Wheel (the rolling wheels connected by a laser).