Alien Trilogy has something really spooky and attention grabbing about it. It follows an old formula with success.
The game stays true to the movies, and a fan can recognize a lot of items and sounds. The trusty radar gives out a high frequency sound as it sends out impulses, the good old rail gun gives off the same flat rapid fire sound, and the hybernation pods open with the same humming noise. Standalone however, the gameplay is far from perfect. The mentioned above radar doesn't actually work nearly as well as it does in the movies (remember boys, deffective equipment - soldier's enemy number one). It only reports enemies when they spawn and jump right in front of you. In fact, sometimes my have eyes already detected aliens in front of me while the radar was still blank. This is just one of the examples that reveals the unpolished overall look of the game. Developers just didn't bother too much.
Graphics
Speaking of looks, at the time of its release, Alien Trilogy doesn't shine with graphics. There aren't many 3D models. Most of the stuff is drawn and colors are dull. You can get tired after all those corridors. However, this somehow works into the game's advantage. The game has a very sinister and dark feel to it, just like the movies did. There are few cutscenes, but those that are there are well made indeed. Sound
Developers didn't bother putting more sounds in the game than it was necessary...actually they didn't do that quite well either. Sound scheme feels a bit primitive, but the same as with graphics, it manages to do its job. In fact sound is one thing I remeber about the game more than anything else. A constant pulsing sound of the radar combined with the alien voice and a dark soundtrack create quite an impression. Conclusion
AT allows you to kill a bunch of scary aliens from the Alien movie series. That's about it. It is not shining with anything in particular, but somehow this dark shooter tends to make you want to come back and play it again.