To gain this trophy you need to finish chapter 3: Borneo in less that 6 minutes and 30 seconds My advice is to do all time trophies in easier difficulty so that the combat won't take long or the risk of dying is minimum Avoid make mistakes (although I admit I made some silly ones and still got the trophies xD), don't get angry or annoyed, try as many times as needed - you can even try some just as test and see how it goes Study the map and traps well - I have repeated all three Uncharted games so many times I literally have in my head the whole game in my head xD knowing where to go, how many enemies show up and where (that helped me a LOT during the crushing difficulty) Go for headshots if needed and wait for the perfect chance to shoot - although in this case it might be hard to do so with enemies far away; in my case some Run And Gun worked Don't look at the clock - it may affect you or distract you Only speed up things when it seems worth it; also if you make a mistake, if it's not too big, don't worry - ignore it and keep trying, you might still have a chance Honestly I expected these missions to be harder, specially with combat involved - it's a matter of timing and knowing the game well