FearLess Cheat Engine

If u using cheats in single player part of game then i must recommend block this game in your firewall (and use 3rd party firewall bc W10 reseting firewall rules in some large updates). Its more safe, but can be alitle problematic for steam games.

4th reason for detection - some trainers using realtime packers or obfuscation tools, like as real viruses
5th - quite rare but some games try detecting hacking tools then process of trainer must be hidden agains game and operating system, this technics are known as rootkit