The Cake is a Lie

Origin: Portal

Motivation can be a bit of a sticking point for most game enthusiasts, but everyone loves cake, right? When GlaDOS taunts you with a tasty end-game treat for completing her malicious and mentally exhausting challenges, we all so desperately wanted to believe in it.

Like salt in the wound, the revelation that the cake had always been a lie was so devastating, the phrase became synonymous with false hopes and disappointment; something the Internet delivers on a daily basis.