Epic just announced the upcoming version 2 of their Linux implementation of Easy Anti-Cheat. It’s based on using the Linux eBPF security module to monitor what’s happening, and then a bunch of extra infrastructure to make sure this can’t be bypassed. The core part of this is requiring secure boot be enabled (ensuring that modified kernels can’t be used), using measured boot to verify that secure boot is enabled and which keys are used (to prevent you from just signing your own modified kernel), and then doing remote attestation, a mechanism where the TPM generates a signed copy of the boot measurements and passes that off to a server which verifies it came from a real TPM, verifies that you have secure boot enabled and are using the right keys, and presumably then allows you into the game.