As we can read on Wikipedia, X-COM: Genesis is a cancelled RTS in the X-COM series, that was in development by MicroProse and then by Hasbro Interactive. The game was never completed due to Hasbro’s shutdown of Hasbro Interactive in late 1999. For this project the team developed a “Geoscape” view of Earth from orbit, that far surpassed the implementation in previous versions.
The team also created a level editor to allow the artists to build levels for the “Battlescape”—the areas where battles against the alien invaders would take place. In an early tech demo we can see an urban environment with a filling station, warehouse, an apartment building, attached parking garage, a park, a burning trashbin and streetlights that cast pools of light. Floating above it all was a blimp with floodlights streaming earthward. Standing in formation outside their aircraft were the X-COM soldiers, shifting on their feet, looking left to right.
Some more info can be found in an interview with Dave Ellis:
As for the “true to the original game” part, absolutely! Genesis was designed to follow the same basic game formula as UFO Defense and Terror from the Deep—research, buying/building, recruiting, intercepting UFOs, and fighting tactical missions. The mechanics of the game in the strategy layer (the Geoscape and all related screens) were virtually identical to those of the first two games. The combat portion of the game was going to have a very similar feel, but it would have had slightly different mechanics (real-time, for instance—more on that later).
Thanks to f2bnp for the contribution!