The video above is of a guy who was lucky enough to do this trophy, I was also lucky enough to get it, it may seem difficult but it is actually easier than you think, especially with the Nova bomb. I recommend playing control, because this is the game mode where you will have more people stuck together in the same spot and just Nova bombing them. Also you can get this with the Titan's super, and the Blade Dancer super of the hunter (you can get it with the golden gun but is is difficult) you can also go about getting a long killstreak, and it is a fun way to get it especially if you are in the moon. you can use the turret or pikes to get an advantage and hide so you don't die. This trophy is fun to get on its own so if you really want to get it go for it but I recommend playing the game for fun this should come on its own.