All the official neverwinter campaigns (not including the extra premium modules and player made modules)... yick.
Oogie's Revenge... if the nostalgia wasn't so awesome, I would have thrown away the trashy DMC rip-off as soon as I had completed the first level.
Guild Wars Prophecies/Factions ... Both are terribly constructed storylines and have poor cutscenes in comparison to the other two installments available (NF and EotN).
Prophecies: Poor protagonist, easy to beat, the old school AI still lingers inducing frustration, worst protagonist ever, lack of any actual... heroes?
Factions: Rushed world design, unfinished plot left to be told through lore (again rushed), half the game dumps you in this gosh ugly city (mind you, Jade Sea is awesome), cutscenes missing something (russssshed) and Shiro is meh.