Prior to the Acclaim release, ABC Television produced a downloadable episodic video game for PC and Mac entitled Alias: Underground, which was available through ABC's website. Developed by a now-defunct company named Dream Mechanics, the game was a 3D third-person stealth/action game like the Acclaim production, though with comparably lower production values. Each level of the game was produced as an individual episode and released on a monthly basis during the second season between September 2002 and June 2003. Some levels resembled episodes from the TV series (such as "Raid on SD-6", based on first season episode "The Box"), while others were unique creations. For a time, players were eligible to enter a contest based upon their score in the game.
Recently,[when?] ABC Media announced the ceasing of support for the online game, due to low usage, as the game was easy to complete and new levels were no longer being added. At one time the game was offered free of charge, but now ABC charges US$0.99 for each mission (excluding the training mission, which is still available for free download).