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
Stealth staples
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These are games where being unseen is the plan, not the failure state. Light, sound, patrol routes, and patience matter more than charging in.
medium
Grid-based tactical RPGs
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Positioning is the game here. These battles ask you to read terrain, turns, class roles, and risk before anyone gets to look heroic.
hard
Comic-book roots
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tricky
Fighting sequels with numerals
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The solve is in the title furniture: II, VI, 3, and 11. The games do not share a genre cleanly, which is the point. The number is doing the work.