For additional gameplay context, the Dark Souls Wiki provides a historical overview of all version changes, including the fundamental differences between the original game and the Remastered edition. Dark Souls: Remastered - Patch note 1.03
Fixed a bug that triggered the ending at the Kiln of the First Flame without defeating the final boss. DARK SOULS REMASTERED Update v1 03-CODEX
Resolved an issue where asynchronous messages would fail to appear for other players. For additional gameplay context, the Dark Souls Wiki
The Official Bandai Namco Patch Notes detail the following key improvements: For additional gameplay context
Fixed matchmaking failures when attempting to join sessions with blocked players.
Improved security measures against cheating in online multiplayer.
Fixed a bug that caused players to become invisible during online sessions.