Stunt Rally

Stunt Rally is a racing game which focuses mainly on rally racing and it also has some stunt elements like ramps, loopings and pipes. In singleplayer, you always race against the clock. You may also do so in championships and challenge series. There is a networked multiplayer mode.

All tracks are closed-circuit tracks. The road can be on the ground, be tilted, go through puddles of water or mud, be a bridge or be a large pipe. As this is a rally racing game, roads tend to be slightly slippery, but even more so in rainy tracks.
The game features 127 tracks in 24 sceneries, 19 cars. The tracks are set in more or less realistic environments. You race through jungles, forests, swamps, deserts, mountains, snow storms and sand storms. There is a small but growing amount of tracks which are set in surreal fantasy worlds.

Car simulation is done by VDrift (game also here) and rendering by OGRE.
The road is based on a 3D spline and it's fully customizable in editor.

Track editor
Stunt Rally comes with a powerful editor which allows to edit nearly every detail of the track. You can edit sun’s position and its brightness, change the sky, weather and fog. Terrain shape can be generated in editor or you can edit it on your own with a large set of “landscape paintbrushes”. You can place puddles, objects and other junk whereever you like.
At the moment only closed-circuits are possible. You can add bridges and pipes. You can alter the track width at any point of the track and you can alter the track tilt on bridges. If you’re more skilled, you can create loopings and corkscrews and whatever other track form you may come up with using these simple tools.
Track editing is explained in detail in a series of video tutorials.

Minimum system requirements: 

CPU: dual core or better
GPU: GeForce 9600 GT or Radeon HD 3870 with 256 MB VRAM
It is possible to run with older specifications.