Alien Trilogy (Greatest Hits) - PS1 Game - Retro vGames
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 Resurrection (PS1 Gameplay) | Forgotten Games - YouTube
Classic Game Room - ALIEN TRILOGY for Playstation review - YouTube