Researching computer cheats as a hobby, currently more interested of anti-cheating.

Anti-Cheating and cheating are actually the very same thing, i don't choose sides. Both requires the same creativity.
VAC/EAC/Vanguard are good examples of cool anti-cheats, because they are less likely to harm non cheating players. Obviously no cheat / anti-cheat is perfect.

SubGetVariable - infects DXE bios image with backdoor before boot.
pcileech-wifi - FPGA card looks like a wireless adapter, but hides inside pcileech-fpga researching tool.
smm - modified SMM bios image manipulates CS2 cvar on system sleep mode (see video).
AmdRyzenMasterCheat - remote access tool inside AmdRyzenMaster utility (see video).
SetWindowHookEx - executes vulnerable routines inside CS:GO to enable wallhack.

logitech-cve - uses logitech virtual driver for mouse input
MouseClassServiceCallbackTrick - spoofs _ReturnAddress() to get through Anti-Cheat hook.
MouseClassServiceCallbackMeme - rewrites mouse callback to completely circuivement Anti-Cheat hook.

efi-monitor - hooking ntoskrnl.exe before launch
acdrv - base (mouse/exception/syscall/swapctx)

ec-guard - Usermode anti-cheat component (mouse input detection)
EC - CS:GO/Apex/CS2 pen-test (EFI/DMA/Kernel/Usermode/Linux)
drvscan - advanced tool for scanning PE images / PCI devices / EFI memory tables