Stoplights is a secret level found in the game Psi-Ops: The Mindgate Conspiracy. It is collected when a certain gnome is obtained.
Stoplights consists of a series of rooms. The first room has to panels and a Labcoat. The second room has three panels and a labcoat. The third room has four panels. When looked at with Aura View, the panels change between green and red.
The goal of the game is to collect the gnome. Push a green panel to open a door, and push a red panel to open a door with multiple Meat Puppets. The second set of panels can only be activated by a labcoat. The third set has four doors, and only one has the gnome. The other three cause instant death.