Fun fact about the score to Aliens. There's an iconic song towards the end called Bishop's Countdown.
https://youtu.be/TX1rxPBTyEY?t=1m
It has been recycled over and over again, particularly in trailers. It's like the Wilhelm Scream... once you start looking you'll start noticing it (and its homages) constantly.
https://youtu.be/dZ0dH5qv1mA?t=1m23s
https://youtu.be/-bBay_1dKK8?t=59s
https://youtu.be/jdl6eAIx2K4?t=1m35s