I suggest a Call of duty black ops 3 trainer

maybe develop for black ops 3 singel player and solo zombeis

Welcome to the community.

Already exists.
However, it seems to have had anti-cheat bypass issues, so development was frozen.
See: Call of Duty: Black Ops III Cheats and Trainer for Steam.

Also, I changed your thread title since it could mislead people to thinking this is the official thread for the trainer.