Spoilers ahead: for the puzzle and the movies/games
This page reveals all categories and answers for this puzzle. It also discusses plot details, story endings, and other spoilers for some of the movies/games shown.
easy
Paint transforms the playable terrain
[object Object] · [object Object] · [object Object] · [object Object]
Paint claims ground, opens routes, or changes surface physics. The level is not finished until the player has redecorated it by force.
medium
Historical figures enter a fictional conflict
[object Object] · [object Object] · [object Object] · [object Object]
Real rulers, warriors, and thinkers step into wars rewritten by the game. History supplies the cast, then the player ruins the timeline.
hard
Music by Grant Kirkhope
[object Object] · [object Object] · [object Object] · [object Object]
tricky
Titles built from body parts
[object Object] · [object Object] · [object Object] · [object Object]
ARMS states the answer outright. Headlander, Backbone, and Iron Lung tuck anatomy into larger words or phrases, with varying concern for medical accuracy.