First, an important word of warning: If you don't own a decent analogue joystick (and have it ready), don't bother with this game! Keyboard controls exist, but they are totally useless and will prevent any fun from developing. Now that this is off the table, what is Flight Unlimited? How did they attempt to fill the gameplay/goal void which usually plagues civilian flight simulators? First, you have to understand that rather than simulating a regular aircraft, this game is about aerial-acrobatics. If you think looping, you've got the right idea (though that is, of course, not the only maneuver you will perform).
"3.. 2 .. 1 .. GO!" And right off the racers go with screaming tyres, tailgating each other eagerly to reach the lead position, which has to be defended at high speed. You snooze, you loose! With great care you have to worm your way past your opponents, while they try to slam you against the tunnel wall or slow you down by surrounding you from all sides. If you don't take care, you end up in the ditch real fast, where you have to struggle hard to reach up front again. Welcome to Screamer, one of the fastest racing games of the late nineties!