In Alien Resurrection (2000, exclusive to PS1), some of the doors will refuse to open if you play on an emulator or PS3 console... but not if you play on real hardware.
Alien Trilogy (Sony PlayStation 1, 1996) for sale online | eBay
🕹️ Play Retro Games Online: Alien Trilogy (PS1)
PlayStation At 25: How The Game Of A Bad Alien Movie Changed Shooters Forever - GAMINGbible