Patrol routes
Guards and enemies follow predictable paths through a level, creating windows and rhythms the player learns and exploits. Patrol routes are the clockwork that makes stealth a puzzle: by observing the pattern, the player finds the timing to slip past, take down a straggler, or reach an objective in the gap. Metal Gear and Hitman build infiltration around reading and manipulating these loops. Designers use patrols to make levels feel alive and populated, to create learnable timing challenges, and to give the player a system to observe and outsmart rather than a random threat. Key decisions: route predictability versus variation (perfectly looping guards are gameable but can feel robotic; slight randomization adds tension but risks unfairness), how patrols react to disturbances (investigating noises, finding bodies), staggered timings that create solvable-but-tight windows, and telegraphing so players can learn routes without dying repeatedly. Pitfall: patrols so random the player can't plan turn stealth into luck, defeating the observe-and-exploit fantasy.
- Dev effort: Medium
- Timing: Real-time
- Common in: stealth