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This wiki contains research on Ubisoft's Game Service SDK, its protocols and architecture, aiming to enable online service emulation for legacy titles.

Services

Service	Protocol(s)	Description
GSConnect	HTTP	Online service configuration
NAT	SRP	Connectivity over NAT
IRC	unknown (TCP)	In-game chat
Router	GSM	Game data
CD-Key	CDKM (UDP)	Auth and key validation
Proxy	unknown	Ladder scores and persistent data

Games

Unverified list of titles that may depend on GS is available here.