"Half-Life 2" runs on the Source Engine.

The statement "Half-Life 2 runs on the Source Engine" is true because Half-Life 2, the critically acclaimed first-person shooter video game developed by Valve Corporation, indeed runs on the Source Engine. The Source Engine is a game engine developed by Valve Corporation specifically for their video game titles, and Half-Life 2 is one of the prominent games that utilizes this engine for its graphics, physics, and overall gameplay mechanics. The Source Engine has been praised for its advanced capabilities and has been used in various other Valve games as well, making it widely recognized in the gaming industry.