wallhacks

Wallhacks are cheats in video games that let players see through walls and other solid objects, revealing enemy positions, items, or objectives that should be hidden.

The term combines "wall" with "hacks" in the sense of unauthorized modifications.

Wallhacks give unfair advantage in competitive shooters where map awareness is crucial: He's definitely using wallhacks—he knew exactly where I was.

Also called wallhacking or walls: That guy has walls.