The 2023 TF2 / Source Engine Asset Leak refers to a massive repository of internal files from Valve Corporation that surfaced online in January 2023. Containing approximately 61GB of data, the leak included original source assets for Team Fortress 2, Half-Life 2 episodes, and Counter-Strike: Source. Fans and modders spent weeks digging through unfinished maps, early character designs, and scrapped weapons that never made it into the games. In meme culture, the leak is often used to joke about Valve’s abandoned projects, the desperate search for the mythical Heavy Update, or the sheer absurdity of discovering a decade's worth of digital trash. It captures the perfect mix of community excitement and the realization of how much content was left on the cutting room floor.