When The Lights Go Out is a game developed for Personal 500 computers by Titanium Ninja Team #4. It was released in 1995 for a price of $2.99. It was a Doom-clone survival horror game, using a custom engine. It was praised for its excellent lighting physics and fluid 3D animations, but criticized for the short amount of gameplay. The game was made in a 2 month period, which explains the 1 hour maximum play time. The engine, known as the Titanium Lights engine, would later be used by many other first person shooters made by Titanium Ninja.