From Lego.com comes one of the best Shockwave 3D implementations I've seen. Supersonic RC mixes fast and furious checkpoint racing with extreme stunts. What you wind up with is a 3D racer that is exciting and fun, with 5 different challenge modes of play. Each level must be unlocked by completing the one before it, thus providing a system of rewards that enhances enjoyment of the game.
The first level, Free Driving, acquaints you with the vehicle, the environment, and the placement of the checkpoints. The goal is to make two complete laps of the circuit within the time limit. An arrow on-screen points in the direction of the next checkpoint to help you along. The second level, Checkpoint Chase, gives you just 10 seconds to reach each checkpoint. Doing so shouldn't be too difficult once completing the first level.
Subsequent levels require you to perform aerobatic stunts for points. Simply get your racer off the ground any way you can. The more flips and turns in the air you do, the more points you'll get. Landings do not have to be perfect, this is worry-free extreme stunting at its best. There is also a scavenger hunt element added where finding the higher ground is necessary to rack up enough points to move on.
Plain and simple, this game ROCKS and is a lot of fun to play. The framerate may drop on slower computers since it is Shockwave 3D, but it was fairly smooth on my 1.7GHz P4 with GeForce4 video card. The only other downside I see is that you must unlock each level each time you play, but that is a small issue since each level offers something slightly different.