UKSR

Author: pink404

An ULTRAKILL ranked speedrun mod.

Private rooms and public matchmaking are Steam-backed and require a valid Steam profile.

Private room codes are reversible Steam lobby IDs. The underlying lobby is joinable through Steam by ID, while UKSR marks it private in its own metadata and does not surface it as a public ranked queue.

Public matchmaking uses 2-player Steam queue lobbies with worldwide LobbyList discovery, exact category/scope/difficulty matching, soft ELO preference, and deterministic convergence when two queue lobbies are created at the same time.