Leisure Suit Larry 8, tentatively subtitled Lust in Space (as well as “Explores Uranus” in some references), was a computer game part of the Leisure Suit Larry series, which was in early development in 1998. Only some very early test stuff was being done while Al Lowe waited for the project to be approved, but in the end funding was cut and the project cancelled. Shortly afterwards, Sierra’s adventure games department was disbanded and Al Lowe left Sierra on February 22, 1999. Like the canned Space Quest sequel, Larry 8 was to be in full 3D, but no more than a few test renders now survive.
The full title of the game, as well as its teaser, was referenced in Leisure Suit Larry: Love for Sail! triggered with an easter egg after completing the game. [Infos from Wikipedia]
Thanks to Celine and Frank Cifaldi for the contribution!