A complete list of the Windows API’s that GameGuard hook in Ring3 (usermode) and Ring0 (kernelmode)..

..atleast I think I got them all in here ;P

Ring3

advapi32.dll
CreateProcessWithLogonW

gdi32.dll
GetPixel

kernel32.dll
CreateProcessInternalW
DebugActiveProcess
DeviceIoControl
GetProcAddress
LoadLibraryExW
MapViewOfFile
MapViewOfFileEx
MoveFileW
OpenProcess
ReadProcessMemory
VirtualProtect
VirtualProtectEx
WriteProcessMemory

ntdll.dll
NtLoadDriver
NtOpenProcess
NtProtectVirtualMemory
NtQuerySystemInformatio
NtReadVirtualMemory
NtSuspendProcess
NtSuspendThread
NtTerminateProcess
NtTerminateThread
NtWriteVirtualMemory
RtlGetNativeSystemInfor
ZwLoadDriver
ZwOpenProcess
ZwProtectVirtualMemory
ZwQuerySystemInformatio
ZwReadVirtualMemory
ZwSuspendProcess
ZwSuspendThread
ZwTerminateProcess
ZwTerminateThread
ZwWriteVirtualMemory

user32.dll
GetWindowThreadProcessI
PostMessageA
PostMessageW
SendInput
SendMessageA
SendMessageW
SetCursorPos
SetWindowsHookExA
SetWindowsHookExW
keybd_event
mouse_event

Ring0
NtConnectPort
ZwConnectPort
NtOpenProcess
ZwOpenProcess
NtProtectVirtualMemory
ZwProtectVirtualMemory
NtReadVirtualMemory
ZwReadVirtualMemory
NtWriteVirtualMemory
ZwWriteVirtualMemory
SendInput