You could argue this one is feasible to do naturally, but it is not. The reason is that although it may seem easy because there are so many opportunities to hit an enemy from the grind lines, almost all of the zones containing a grind line are just for traversal purposes with no enemy in sight. But I will show you my method and another if you want a different route. Let's get started: For the trophy, The floor is lava; you need to hit 20 enemies while grinding on a grind line. Here is the method I used: 1. In the first chapter," **Uninvited Guests,**" the mission starts with a cutscene showing the main protagonist, Ghostrunner JACK, looking down on a brawl and cleaning his katana by spraying the blood from his enemies. I gave explicit descriptions so you know what cutscene it is as it transitions to gameplay out of nowhere. The game takes you directly to a grind line with a single enemy trying to shoot you, which makes the perfect situation for acquiring the trophy. Just hit him with a shuriken, restart the level, and do it again; you cannot reload the checkpoint, as when you kill the enemy, it creates a checkpoint automatically.  I love this method because you just need to restart the level and skip the cutscene, which makes it 10x faster. BUT, if you're starting the game for the first time, you won't have shurikens available yet, so I have another solution. 2. On the Chapter" **A price to be paid**" at the end of that chapter, you will go to the area where the enemy is trying to take down the HQ. What is good about this area regarding this trophy is that for every three kills, a checkpoint will activate, and there will be more than 20 enemies, which is what you need for the trophy. That area has multiple grind lines; the only inconvenience is that you must restart the whole level if you don't get in on your first attempt. Unlike the first method, this one is at the end of the chapter and not the beginning.  **USE METHOD 1 IF YOU ALREADY COMPLETED THE MAIN STORY OR USE METHOD 2 IF YOU WANT TO GET THE TROPHY WITHOUT USING CHAPTER SELECT.**