This is a style of a videogame Look Outside, a horror RPG Maker game (https://store.steampowered.com/app/3373660/Look_Outside/).
KREA2:
No main trigger word.
Recommended prompt: digital pixel art style, horror-themed, dark, pixelated retro video game aesthetic, bold and contrasting colors, with textured, slightly blocky effect
Strength: 0.8 - 1.1 (0.8 for better details, 1.1 gives more of the style, but can cause additional artifacts on some objects, especially white ones)
ILLUSTRIOUS:
Main trigger: l00k0uts1d3
Additional trigger (I'd say, it's mandatory): pixel art
May help: dark, dark background, (to add some horror into it) sharp teeth, grin, monster, (if you want a scary monster)
There is also Sam, the protagonist of the game. I used his mirror portraits. If you want to generate him, use: 1boy, s4m, black eyes, short hair, black hair, sweater, pants, shoes, sanpaku
Recommended strength: 1.2 - 1.5. I use 1.5.
Known issues:
Can rarely spawn extra limbs. Use "extra arms, extra legs" in negatives. Or use it in promt for scarier monsters.
A lot of characters in the game have blue skin. Use "blue skin" in prompt, if you want it, or add it to negatives, if you want to avoid it.