Take you time on the mission "Rebirth Island" To avoid spoilers to much you're basically in a Hazmat suit and if you take damage your mask breaks and you die. The mask doesn't have Health regeneration like you do so if you take to much damage that's it. If you die you'll have to restart the mission I say just play it on Easy and take your time once you finish the mission without dying the trophy will pop. A rather easy Silver if I do say so myself even more so if you have finished the mission already and know what you need to be doing.