If you are setting up RPCS3 on your Steam Deck or booting up your old jailbroken PS3, do not stop at the title screen. Find the complete collection. Unlock Julius Belmont. Grind Chapter 10. Kill Dracula with 5 other players online.
The game's DLC is primarily split into extra stages (chapters), new playable characters, and music packs. Playable Characters Castlevania Harmony Of Despair Dlc Pkg
Navigate to > Install Package Files > Standard . Select the Castlevania DLC .pkg to install it. If you are setting up RPCS3 on your
Castlevania: Harmony of Despair DLC package primarily includes new playable characters