F1 - Infinite Health
F2 - No Reload
F3 - Infinite Ammo
F4 - Infinite Grenades
You should play without internet connection just in-case because the single player seems to have anti-cheats .
Don't delete any of the DLL files next to the trainer , Unless you have c++ redistributable 2015 64X installed then feel free to remove the DLL next to the trainer.