* The Finale of the latest plot is one giant Tearjerker. [[spoiler: After some of the citizens [[NiceJobBreakingItHero killed Portal Sir]], it resulted in the deaths of Portal X, Nergal, and System, the Godlike beings who run the place. Sensing the deaths, Alpha arrived to teach the citizens a lesson by deleting the Gamma and the people.]]
** The deaths of [[spoiler: [[AnyoneCanDie Multiple people]]]] and the reactions of the others.
* Zurg's death when [[spoiler: Portal G turned him into a gold statue.]] Talk about a MoodWhiplash.
* Anytime a character is PutOnABus and the people they leave behind find out. Its never pretty.