Jet Set Radio PS3 has no online multiplayer, but it includes leaderboards for high scores and graffiti tags. Those still function if you are signed into PSN (risky on CFW – use PSNPatch to disable syscalls).
Navigate to > Package Manager > Install Package Files > Standard . Select the Jet Set Radio PKG and press X to install. Step 3: Activate the License (RAP File) jet set radio ps3 pkg install