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Constant definitions for the Microsoft Game Development Kit (GDK) error code values, declared in XGameErr.h. This overview is organized by subsystem, and each table is sorted by increasing HRESULT value to make numeric lookup easier. For comprehensive tool and platform HRESULT coverage, including launch, deployment, and diagnostics tool scenarios, see Error Lookup (xberror.exe). Universal Error Messages (UEMs) are the full-screen E-series errors (E100 and up) that a dev kit shows at boot or during a system update. For the full table and fixes, see Universal Error Messages.

Game runtime

Game user

Game package

Game store

Game streaming

Game save

Global

HTTP Client

Auth Manager (AM)

XUser token and signature

XAL

XSAPI

Console tools and transport

XBOX PC Remote Iteration

XAPU

XDSP

Last modified on September 7, 2026