Grand Theft Auto III:
The very first time you got to get into a car after the intro stops was thrilling to say the least
Pain Killer:
Fighting the swampthing endboss was rather difficult cause I kept forgetting to shoot the monster and kept looking at the way it looked & moved
System Shock 2:
Just after you wake up and ran to safety, you sneak around this computer room, and every time I play that level I get scared shitless cause of this comuter that explodes next to you
Tron 2.0
When you walk around inside the firewall I had to keep looking at the huuuge rotating devices, awesome! And everything in the infected computers simply looks amazing