Alien³, or more simply Alien 3, is the videogame based on the sci-fi horror movie with the same name, the third of the series.
The game was developed by Probe Software originally for the Mega Drive / Genesis console, but it was converted to Amiga, Master System, and Game Gear. A reduced version was also released for the Commodore 64, while the SNES version is an entirely different edition. All the versions were published in 1992.
The game's plot starts precisely like the movie, with Ripley waking up from the cryosleep and realizing that two aliens had entered the ship before the takeoff. The monsters killed everybody (apart from Ripley, of course) and forced the vessel to land in Fiorina 161, a prison planet. But once the game starts, you will notice it is pretty different from the movie. Ripley is armed with a big gun and has to fight tons of aliens, explore the levels and try to save hostages. Not exactly the plot of the movie.
The graphics are excellent, with big sprites and a well-designed environment. A lot of cutscenes help create the atmosphere. As you can expect, the difficulty level is high, like many platformers/shooters of the 90s. Some features such as automapping and a less demanding difficulty progression would have made this game a masterpiece.
Said that we are talking about Alien and Lieutenant Ellen Ripley. Seriously, do you really need more reasons to play this game?