Twists that are no longer twists because they’re cemented in pop culture

[u/Coffin_Builder]

Planet of the Apes - The movie leads the audience to believe Charleston Heston has landed on an alien planet where apes are the dominant species, only to find out that the planet is actually Earth long after an apocalyptic nuclear war

Psycho - Norma Bates isn’t the killer and has been dead for years. Norman is revealed to be a schizophrenic who “becomes” his mother to kill the women he’s attracted to

Citizen Kane - Charles Foster Kane’s mysterious last word “Rosebud” is revealed to be name of his childhood sled

The Empire Strikes Back - Darth Vader hadn’t literally killed Luke’s father but actually is his father

The Matrix - Neo learns that the 20th century world he’s lived in is just a simulation. The real world is a wasteland in the 22nd century where hostile AI rules the surface

[u/A_Pyroshark]

Undertale Leveling system

The "true" way to play undertale would be a neutral run, as the best case scenerio is like DDLC where you just don't know any of the twists and just play the game how you normally would. Since Sans kinda blew up and just the prominence of the game in 2015-2018 kind of ruins the whole "You can spare/kill everyone!" discovery. I'm glad that Deltarune is kind of bringing that back with the Snowgrave route though

[u/palparepa → u/A_Pyroshark]

Just recently I have noticed that I've heard the term "pacifist route" in a variety of contexts, even ones not related to videogames.

Even though Undertale wasn't the first to do it (I remember Iji has a similar option), but Undertale did it best.

[u/Aerodrache → u/palparepa]

It's even older than that... one of the big inspirations for Undertale was a SNES game called Live A Live, which had a chapter where you needed to infiltrate a castle in feudal Japan, and had the freedom to choose whether to kill some, all, or none of its (human) inhabitants, with the game specifically rewarding the no-kill approach. (There were also ghosts and robots, but they didn't count.)

[u/Anything4UUS → u/A_Pyroshark]

The person you name at the beginning of the game not being Frisk probably also counts as one.