Well, Zone Zeus is hard, there is no doubt in that. There's no real trick to beating it you just need practice.

On a side note, this is a prime example of why I never wanted trophies on the PS3. In many ways I think it ruins the experiences of some games. I can't condemn people from wanting them and I certainly can empathize with the TC. I got close to Plat in Resistance 2 and started grinding away for the final trophy but it was a miserable experience and I wasn't enjoying myself. So I quit without Platinum, but it was tough to do, and in the end I don't look back on the game with fond memories.

Anyways, I've seen lots of people get in on this game because of the trophies and get hooked on the gameplay, so who knows.