The inquiry regarding a specific “Third Episode” being delisted from Steam requires further context for clarification. Steam frequently alters the availability of various titles and content, which can include the delisting of episodes or standalone games. For instance, the visibility of the standalone episodes of the Half-Life 2 series has been reduced, indicating that not all content remains readily accessible.

Additionally, titles like Poker Night 2 by Telltale Games may have been removed from the platform due to publishing complications, illustrating that delistings on Steam can result from various factors. To provide a more accurate answer, it would be beneficial to know the particular game series or episode in question. This information would allow for a more tailored response regarding its status on the platform.