I actually made this prequel 3 years ago, after finishing Escape From Unreal 1, in a period of time when I didn't have any internet connection. Once finished I wasn't able to export the game due to compilation errors that now I know how to solve, so here is it! Coming soon!
The game is shorter than Escape From Unreal 1, it has one main level to give context to Escape From Unreal 1, it happens right before part 1. Then you have 3 extra levels of past military missions of the red robot we control, in other planets and contexts, they have nothing to do with the main story, its just extra content.