Wallace & Gromit’s Grand Adventures from Telltale Games has been removed from all digital distribution channels due to the expiration of a distribution agreement between the developer and Aardman Studios.
According to Telltale, there are no “plans to renew the agreement at this time.”
If you have already purchased the adventure titles, you can still download them from the cloud via Steam, Telltale’s online store, or XBLA.
Those who purchased it on iOS will have to contact iTunes customer support, and event at that, the “decision to restore the app may be at their discretion,” notes Telltale.
You find instructions on how to redownload the games through the forum link.