Rainbow Six Siege
Tiny bullet holes in soft surfaces once let defenders watch attackers with almost no visible exposure. Ubisoft eventually reduced or removed many of these abusive sightlines.
Certain shield and object combinations let operators expose barely any head hitbox while still shooting or spotting. These positions became notorious in competitive play.
Before restrictions were tightened, Valkyrie could place cameras outside in ways that gave defenders massive intel on the attacking approach. It was one of Siege's classic information exploits.
Attackers and defenders alike exploited tiny angle openings around Mira setups to gain sight without meaningful return exposure. These micro-lines were often map and patch dependent.
Players used vault timing and lean states to reduce exposure or accelerate entry paths through windows and cover. These animation interactions were repeatedly tuned over Siege's life.