The best way to run the game for ALL PLATFORMS, NOW that it has OFFLINE mode, is to turn off your internet or disconnect from the internet, then delete the files here:

C:\Users\\AppData\Roaming\EasyAntiCheat

Delete the .sys files here:

C:\Program Files (x86)\EasyAntiCheat_EOS

Then run the game (in STEAM you need to have STEAM already in OFFLINE mode).

You will be able to attach the trainer.

The old methods are here, but may not work any more.

This game comes with a program called EASY ANTI CHEAT which hijacks your operating system at the KERNEL LEVEL, similar to a rootkit virus. This blocks you from accessing programs on your own computer. To bypass this intrusive program, replace the files:

Back4Blood.exe
start_protected_game.exe

Usually located here:
C:\Steam\steamapps\common\Back 4 Blood

with the files included with this trainer.

Run the game as normal from your launcher (our trainer was created using STEAM).

Once you are at main menu, then activate the trainer.

If you see:

"Could not install the file - Installtion failed"

Close that screen and then keep trying to tun the game until the game launches.

For GAMEPASS, you cannot use the launcher, you must follow the steps below..

1: close your internet connection
2: rename the EAC main folder which holds the EAC driver
3: run the game using the included shortcut
4: once game runs, start back up your internet connection
5: activate the trainer.

Trainer is up to date, I have no other suggestions

best,
Cal