The player must also take care to prevent Rex getting killed which can happen in many places. Items that are picked up have their own sub-options, most of which the protagonist Rex would not actually do (such as disassembling his binoculars). There are 10 different options, two of which are used to interact with people and seven of which are used to interact with objects. To get from one place to another, Rex will need to make use of teleporters correctly entering the code. To get from one room to another the mouse pointer changes to a 'GO' icon where travel is possible. Some actions like sitting on a chair are automatically performed with just a left click. The left mouse button is used for selecting options and performing actions and the right mouse button is used to look at things (an alternative to selecting the 'look' option and selecting where). Higher difficulties have more puzzles and more death encounters.

The game is divided into three difficulty levels. Their only purpose is to be impregnated by a gender bent Keeper in order to repopulate the planet. The Stock reside above ground and have a primitive culture. The Keepers are technologically advanced and reside underground, where they monitor the Stock. The populace of the planet is divided into two classes, Keepers and (breeding) Stock. This machine became known as the Cosmic Gender Bender (or the Gender Bender for short). They invented a machine that would allow them to alter their sex for short periods of time. As a result, the females were no longer able to give birth, so they had no way of continuing their species. In the end, the females wiped out the male population with bio-weapons. His ship is badly damaged and is sent crash landing on the strange planet, seemingly inhabited by women only.ĭecades ago, a vicious war between the sexes erupted on the planet. Suddenly a large warship decloaks behind him, and fires. Rex discovers that the planet where the vase was last known to reside has vanished, but his ship's sensors still detect a planetary mass and gravitational field, invisible to the naked eye. Rex agrees and sets out for the last known location of the vase. The bumbling bachelor, Rex Nebular, has been hired by Colonel Stone to retrieve a vase that holds some sentimental value for 75,000 galactars.

Tommo purchased the rights to this game and digitally publishes it through its Retroism brand in 2015. It was developed using the MicroProse Adventure Development system, and made use of 256-colour graphics. The game is the first graphical adventure game developed by MicroProse, Return of the Phantom and Dragonsphere being the other ones.

Rex Nebular and the Cosmic Gender Bender is a point-and-click graphic adventure game developed and published by MicroProse in November of 1992.

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