What’s different
Conceptual differences: GDK vs. Steamworks
How XBOX Services, identity, entitlements, and packaging differ from the Steam model.
Feature-by-feature mapping
Initializing the GDK
Replace
SteamAPI_Init with GDK initialization and user sign-in.User auth & ownership
Steam session tickets → XUser + entitlement checks.
Cloud storage
Steam Cloud → XBOX connected storage.
Stats & achievements
ISteamUserStats → title-managed achievements.Leaderboards
Steam leaderboards → event-based stats + query-driven leaderboards.
GDK features not in Steamworks
Quick Resume, Smart Delivery, DirectStorage, and more.
Steam features covered by PlayFab
Some Steam features don’t have a direct GDK analog and are handled through Azure PlayFab instead:- Steam Workshop (user-generated content) → PlayFab UGC
- Steam P2P networking → PlayFab Party
Then continue with the shared workflow
General porting workflow
Tooling, checklists, packaging.
Your engine
Unreal, Unity, Godot, and more.
Publishing your port
Cert, XR, and store submission.