- this trophy is an easy one
- you've to stay for 60 seconds outside of the rings (where you only could shoot)
- try at the beginning as long as you can to stay outside of the rings
- when it seems to be critical move into a ring and shoot some enemies
- then continue circleling
- the good thing is, that you don't have to do it in one run. when you're in a ring the timer will stop, when you're outside the timer will run again and the time will count together
good luck :)