I could have sworn it wasn't loading so slow a year or two back when i last tested it on Alien Trilogy, but i might misremember.
But i do think that the last time i've tried Alien in bin format it played smoother than now in pbp (??). The game does run at 60 fps, but simetimes opening a door or when an alien or two waltz by causes the fps to drop to ~40.
FF: Tactics in pbp has cinematics at full speed and thanks to the option to disable lighting gameplay also mostly hit fullspeed. It does come at the cost of graphical glitches, but
... Come on, we"re at the brink of fullspeed gaming without major bugs and glitches.