Key Narrative of "Portals".

Evaluate what the key narrative of "Portals" is and how it develops it.

In "Portals" the main key narrative is the twist at the end, which is a reversal fortune where the woman after all the hard work she did, training hard to gain strength, getting away from all the "prison" guards with the help of that portal gun, after all of that as she starts getting to the end and her finally thinking she will be free, she soon realises that she's not actually free and that landscape that she saw that she felt like it was liberty was actually just a screen with a gloomy-type of sound effect being executed to kind of show that it is "game over" like it's her doom. 

"Portals" creates a twist which is surprising since you expected her after all of that hard word and effort to escape the so called "prison" , you expect her to have a good ending and for her to have freedom, the twist is somewhat logical also as in the film the woman uses a portal gun, which is quite game-like so it explains why the woman touches a screen towards the end because she's actually in a game, not in a "prison". This also explains why when the woman was training and getting stronger she somehow like "unlocked" the portal gun.