Mystery shrouds Activision's move to quietly pull out its licensed titles from major digital retailers like Steam, PlayStation Network and Xbox Live. Gamers are left in limbo about what happened to top Activision titles like "Teenage Mutant Ninja Turtles: Mutants in Manhattan" and first and second installments of "The Amazing Spiderman."

There is a hint that what is happening behind Activision digital titles disappearing abruptly is similar to the case of "Ultimate Marvel vs. Capcom 3" where a debacle stemmed with the title being pulled out. To recall, Capcom's license agreement expired a few years back. The company opted to pull out the whole game instead of renegotiating characters one by one.

TheZeroReview yielded some interesting discussion about how gamers feel in this Activision development. Some are confused how complicated these license works that it is even coming to a point of affection finished games. "Teenage Mutant Ninja Turtles" and "The Amazing Spiderman" are hit games and it is surprising why the pull down happened when these two are still gaining profit.

Others suspect that it is a matter of sharing revenue between Activision and its partners. If say for example, "Teenage Mutant Ninja Turtles" and "The Amazing Spiderman" made a lot during Activision's antic to make digital copies, copyright holders may have suffered less. Of course, these are theories that are unsubstantiated until Activision themselves talk.

Meanwhile, Kotaku reported that Activision's pull out is not limited to "Teenage Mutant Ninja Turtles" and "The Amazing Spiderman." Other marvel titles like "Deadpool" and three editions of "X-Men" games also went missing.

The same report also clears out that those who purchased "Teenage Mutant Ninja Turtles," "The Amaing Spiderman" and company are not affected. They can still play the game indefinitely, although new purchase is not possible anymore. Remember that PlayStation Network, Xbox Live and Steam are digital copies so discs or physical copies aren't affected neither.