Bigs Rigs. The only game to get the score of 1/10, or "abysmal" rating on Gamespot. The video of the guy playing the game on Gamespot is a must see.
First, there are only 5 tracks to race in the game. And 5 cars. One track crashes the game instantly. (Althoughs ometimes the game crashes just because.) You can go the same speed as you would going on flat land, if you are going straight up a cliff. You can go right past and object in the game, even the track, and the enemy AI. Speaking of which, on the original Bigs Rigs, the AI doesn't work. Meaning that the competing car just sits there and never moves. You can go reverse, and go to an infinite speed, literally. And you can decelerate from that infinite speed instantly by letting go of the reverse button. Which make sense, seeing as to how your lisence plate is not even attached to your car. Rather, it hovers behind your car.