a lot of people have trouble with some of the trophies/achievements that done tell you exactly what to do, so i decided to help with a couple.
Heart Stopper: all you have to do is kill a licker by stabbing it when it is knocked on its back.
Who Do You Trust?: personally, i'd just do this one with a cpu partner. fill both your partner's and your own inventory with first aid sprays. go to chapter 1-2 and set the difficulty to veteran so your health runs out faster. Then go to the electric conduit thingy at the beginning of the chapter, and knife it. keep doing this untill your health meter starts blinking red. At this point, the cpu will come to you and heal you. Keep doing this, and say "thank you" after she heals you. Eventually, you will get the trophy. This may take several tries.
P.S. if your partner runs out of healing items, just give them some.
Hope this helped anyone who needed the help
Heart Stopper: all you have to do is kill a licker by stabbing it when it is knocked on its back.
Who Do You Trust?: personally, i'd just do this one with a cpu partner. fill both your partner's and your own inventory with first aid sprays. go to chapter 1-2 and set the difficulty to veteran so your health runs out faster. Then go to the electric conduit thingy at the beginning of the chapter, and knife it. keep doing this untill your health meter starts blinking red. At this point, the cpu will come to you and heal you. Keep doing this, and say "thank you" after she heals you. Eventually, you will get the trophy. This may take several tries.
P.S. if your partner runs out of healing items, just give them some.
Hope this helped anyone who needed the help