Cheat Engine Question

There is a small online game i want to hack with. whenever i try to open the cheat engine while the game is opened. it gets me disconnected with an error that suspicious activity found on background. Any way to be undetectable ?

There are some basic things you can do like renaming strings in CE using a hex editor and rename the binary to something else. That will bypass some basic homebrew anti cheats, if it's using a well known anti cheat you can Google around for a bypass or a cheat engine that has been modified to be undetected.