Celeste is unique in that its themes of anxiety and self-acceptance were drawn from the developer's personal experience. The game's mechanics — a platformer about climbing a mountain — are a sustained metaphor for mental health struggle: the attempt, the fall, the attempt again. The dialogue between Madeline and her shadow-self is the most honest portrayal of self-criticism and acceptance in gaming.

Ninja Theory's collaboration with neuroscientists and people with lived experience of psychosis produced a game that was used in medical training contexts. The binaural audio design — voices that whisper, warn, and distort — simulates the experience of auditory hallucinations in a way no prior game had attempted. The game's commitment to portraying psychosis with accuracy rather than horror-film aesthetics set a new standard.

Arthur's terminal diagnosis is handled through behavior rather than dramatic monologue. He coughs. He slows. The camp's dynamic shifts around him. The game's journal entries chart his emotional state across the final chapters. The result is one of gaming's most honest portrayals of what it means to live with a terminal illness — not as a dramatic event, but as a daily reality.