I've said it before, but I'll say it again: Jurassic Park: Trespasser was way ahead of its time.
Bump mapping and specular highlighting (in software, even!), "realistic" physics, real-time "foley" sound system, inverse kinematic animations/ragdoll physics, the ability to render a huge game world at once, with hundreds of 3D objects on screen (though it's more impressive on modern hardware with the draw distance increased, otherwise they quickly turn into 2D sprites), etc. etc.
I also loved the hudless system (your health was displayed as a tattoo on your chest), being able to control your arm/hand (though the controls were a bit wonky), and the way you fell over when you died. The AI was really great (it actually felt like I was being hunted, instead of having monsters always coming straight for you), but it was better in the beta version.
I think one of my favorite bits is when a pack of raptors strike you down and then proceed to munch on your corpse, dragging it to and fro, and all you can do is look on in horror.
MoonMetropolis wrote:
Clock Tower for the SNES - Nothing like this had ever been seen before. Before this game came out, games like Haunted House for the Atari 2600 and Sweet Home for the NES were the only "survival horror" games.
Alone in the Dark predates it by two years
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I'll brave the storm to come, for it surely looks like rain...