Payday: The Heist

If you kill 25 FBI agents in a row during a single heist, then you will get this trophy. You are not allowed to kill any other enemy or civilian in-between. You are allowed to wound other enemies, as long as they don't die by your hand. Any heist on any difficulty can be chosen.

The FBI agents can be spotted by their white shirt and black tie. They are equipped with a handgun and will appear between assaults. You can see if you are in an assault by seeing a red triangle at the bottom of the screen with the text 'Assault'. When the assault has ended, the FBI agents usually come. The FBI will search for hostages that you have captured and set them free. So to bring out more FBI agents it's a good idea to keep several hostages.

You can get this trophy easily on either the First World Bank heist or the Panic Room heist. If you don't complete the next objective, then the FBI agents will keep arriving after each assault wave forever.

Just make sure that you only kill FBI agents and let either the AI or the other players take care of the other threats. The trophy will pop up right after killing your 25th FBI agent.

If you want, you can get the 'Body armor increase' and/or 'Thick skin' upgrades to increase your chances of surviving while you wait for FBI agents to turn up. The 'Thick skin' upgrades can be unlocked in the Sharpshooter tree.