The fifth and final episode entitled OUTATIME was expected to be released later this month and on the PS3 and iPad in June.
However, Telltale Games has postponed the release and hinted that it could have something to do with an impending announcement.
From the firm's official blog: "Why June you ask? We have some pretty awesome announcements to make coming in the near future that should answer that question."
The games star Marty McFly and follows on from the events of the film trilogy. The first episode in the point and click series was released in December.
Click here to read our review for Back To The Future: Episodes 1 &2