Other than PSO1&2 and Spiral Knight, has Sega ever hosted any other MMORPGs?
Yes, there were ...
- Warhammer Online for PC
- The Matrix Online for PC
- Habitat II for SEGA Saturn
- Dragon's Dream for SEGA Saturn and PC
- Samurai & Dragons for PS Vita
- Doctor Who: Worlds in Time for PC (web browser with the Adobe Flash plugin)
- Phantasy Star Universe
- Phantasy Star Universe: Ambition of the Illuminus
- Kingdom Conquest II for iOS and Android
All of their servers were already shut down though.
I know of Dragon's Dream for Sega Saturn and PC, but that was Japan exclusive and short-lived. Curious if any Sega MMORPGs ongoing to this day.
Nope, there's only PSO2 (and PSO2es for JP) now. There are still many online SEGA games but they're not MMORPG.
Does Outrigger still have active servers?
No, official Sega servers for Outrigger were shut down years ago, but you can use fan servers.