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1999Developed by NanaOn-Sha

Um Jammer Lammy is a rhythm-based game that takes place in the PaRappa world and tells the story of the all-girl pop rock band, MilkCan. The game has very humorous and catchy music tracks, co-op gameplay, and a plethora of unlockables.
| Language | Interface | Subtitles | Full audio |
|---|---|---|---|
| English (UK) | Supported | Supported | Supported |
| French | Supported | Supported | Not supported |
| German | Supported | Supported | Not supported |
| Italian | Supported | Supported | Not supported |
| Japanese | Supported | Supported | Supported |
| Spanish (Spain) | Supported | Supported | Not supported |