This video will show how to run through in 1:25:41, just watch while you play, you have plenty of time for variance. I made 12 saves and had no problem. doing this on normal gets the samurai edge and rocket launcher as well as trophies for every man/woman for themselves, and complete the game on normal. if you need to stop put the ps4 into rest mode, that's the only way to pause the game's timer.