This game is based on an early cut and scripted version of
Alien 3 (1992), which explains why some elements are not in the finished movie. For example, the boss of Stage 1 is called a "super-Facehugger", which is most likely inspired by the "Royal Facehugger" (a bigger Facehugger that can implant a Queen chestburster) that was later cut from the Theatrical version. The same is true for an abattoir with dead oxen hanging upside down (chestbursters will jump out of some) seen in Stage 3. These elements were restored in the longer Assembly Cut of the movie released in 2003.