- Statue of Luveno from PSI
- Statue of Alis & Myau in Termi
- Statues of Alis in Esper Mansion
- Some books in Saya's school. I don't remember all the games they mentioned. One was Ecco the Dolphin. Does anyone remember the others?
- The crashed PSIII worldship
- Rappies
- The town Tyler being named after the PSII pirate
- The Landale ship
I know there are more, but they're escaping me at the moment. If you can, please do add to this list.