Murder the Hypotenuse: One route of the game is mostly about preventing Lizzie from murdering John's lab partner, who is not interested in dating him but is too nice for Lizzie's comfort.

Getting a good ending is not as difficult as one would think with such a premise.

Multiple Endings: Which one you will obtain depends of pretty much all your choices.

They get to share a brief moment before John dies, too.

Mercy Kill: In one of the endings Lizzie does this to John after Mrs.Smythe injects him with a drug that causes him constant, excruciating pain.

She first appears very suddenly, holding an axe, as part of the background rather than appearing by sliding behind the dialogue box like normal.

Jump Scare: A minor one in the route where Lizzie kidnaps John and holds him in her basement, shortly before she knocks him out.Smythe are not normally supposed to share private details about their patients. Smythe will tell John about Lizzie's past history. Evil, Inc.: KoiTec experiments on unwilling test subjects while covering their tracks through coercion and violence, just so they can grab more money from the military.This establishes Lizzie's character as very interested in John, and also as someone who is willing to take extreme actions due to said interest. Establishing Character Moment: Lizzie leaves notes and a piece of chocolate in John's locker, and then burns down a tree because John didn't like a romantic myth associated with it.Dull Eyes of Unhappiness: Lizzie's eyes go dull when she starts to become angry or unhappy.This serves to introduce the player to Lizzie's mental state. So Lizzie then proceeds to burn down the tree, just because John said he thought the tree myth was stupid. Disproportionate Retribution: At the beginning, Lizzie overhears John talk disparagingly about a school myth that romantic confessions under a certain tree will always go well.

Developers' Foresight: A lot of text slightly changes depending on the narrator's mental state, on which medicine he is currently taking or not taking, and on his general mood.

Smythe provide the slightest bit of color to him.

Deliberately Monochrome: Whenever the story is focused on John, the background is grayed out.

Crazy Enough to Work: Injecting Lizzie with even more serum so she becomes strong enough to dispose of the guards.

Colour-Coded Emotions: The color palette of the game varies depending of the characters' emotions.

Crimson gray 2 all endings