I was just thinking about some of the awesome game franchises that sadly never got a sequel. It's such a shame. Of course it's mainly a matter of taste when it comes to which games belong in here, but some of 'em actually were quite successful. Anyways here it goes:

Full Throttle
Urban Chaos
Oni
Sacrifice
Messiah
Outcast
Evolva
Project: Eden
Hardwar

I'm probably missing a few, so join in and add your favorites-but-never-got-a-sequels to the thread,

Cheers