Half Life 2 Episode 2
Mission Improbable Part 2 (May 2010) Includes both parts 1 and 2. It is planned over three maps, with each map being released individually. Currently two out of the three maps have been released, Mission Improbable and Reverse Advance.
Mission Improbable is a single-player mod for Half-Life 2: Episode 2 that spans three maps. In it, Gordon Freeman is tasked with reactivating a Resistance listening post, which naturally doesn\'t go quite as intended.