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Crawling under a floor

Doom 3: a flashlight illuminates the grated main floor overhead while the player occupies the service space below.The main floor is visible overhead
Doom 3 (2004)A grated floor above the concealed passage
  1. The main floor is visible overhead
© id Software; clip via GameMechanics.org · Source ↗

Space beneath the main floor becomes a concealed route. Its low ceiling restricts posture, visibility and equipment use.

Design tips

  • Give the concealed route a recognizable entrance and exit.
  • Ensure camera restrictions do not hide a necessary turn.

Examples