10 Worst-Kept Spoilers In Video Game History
2. Portal – GLaDOS Is Evil And The Cake Is A Lie
While “the cake is a lie” might not be a clear spoiler in itself just by hearing it, its cemented legacy as such a famous and quoted video game line makes questions surrounding its origin answerable with a simple “GLaDOS is evil and tricks you into making you think you can escape her.”
While a lot of people use “the cake is a lie” as an idiom separate from its specific Portal-related meaning, knowing that GLaDOS wants to keep you trapped in the Enrichment centre is itself a pretty unavoidable spoiler.
With the puzzle element of Portal being the main draw, the fact that its remaining strand of plot lies in a huge twist at the end makes it pretty much the only way you can explain the gist of the story.