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
Skateboarding games
Tony Hawk's Pro Skater 3 · Skate 2 · Session: Skate Sim · Thrasher: Skate and Destroy
medium
Progress depends on swapping between multiple characters
The Lost Vikings · Trine · Thomas Was Alone · Day of the Tentacle
These games make character switching the basic problem-solving language. Progress comes from rotating between different bodies, abilities, or positions and treating the whole cast like a single system.
hard
Other players leave ghosts, messages, or structures behind
Demon's Souls · Dark Souls · Journey · Nioh
These games make solitary play feel haunted by other people. Bloodstains, revenants, brief companions, and built objects turn the world into a trail of human residue that changes how you read danger and progress.
tricky
Boss rush is the whole design
Furi · Titan Souls · Eldest Souls · Alien Soldier
These games do not use boss fights as punctuation. Bosses are the architecture. Almost everything in the design exists to move you from one duel to the next and test whether you learned enough to survive it.