If realism is what you crave, look no further than GTR. Just ask the drivers that "use" GTR as a tool for practice.

User Rating: 9.4 | GTR: FIA GT Racing Game PC
In 1998, Papyrus released a driving simulation by the name of Grand Prix Legends. It completely turned the driving sim community on it's head with a level of detail in the physics engine that allowed the player to experience what it was like to drive one of those unruly machines at the edge of their performance envelope. After days of mastering the techniques, it proved to be the most satisfying and truly adrenaline inducing experience for fans of auto racing. Following in the footsteps of Papyrus, 10Tacle and SimBin have released what is a stunning simulation of the FIA GT series cars: GTR. 10Tacle has created in GTR, the most realistic simulation of race car driving thus far. If you want to experience the thrill of barreling out of parabolica at Monza in a 600+ horsepower super car - with all the tactile and audio/visual nuance of the real thing, a good force feedback wheel and GTR are your ticket to paradise. For the uninitiated, this program is more akin to Microsoft Flight Simulator than it is to Need For Speed in terms of it's general concept. The only things here to accomplish are to master the cars and win races against the CPU cars or against other drivers during online play. Everthing the game has to offer is immediately available to you. Just to be clear - there's no story - no unlockables - no real campaign (save the season mode, which is basically driving the courses in the correct order of the FIA GT season.) The game features 10 tracks out-of-the-box. They are the ten tracks for the 2003(?) FIA season - I'm fairly certain. Also available for free download are three oval tracks for a different experience. Also included with the game is the actual MOTEC software that you can use to analyze the telemetry data from the race cars. No this is not a fudged simulation of the software - it is the real thing!! GTR actually creates telemetry data just as a real race car does (tweaking the car setup is a huge part of the experience). The MOTEC software doesn't know the difference. Apparently, drivers have compared the data from real-world driving with the sim data and they are eerily similar - to the point that the drivers can use GTR to try the cars with different setups and collect useful data!! If you are a racing fan you've most likely dropped your mouse at this point and went out to buy GTR - which you undoubtedly should. If your not a racing fan (that's wants to experience the real thing), you probably will find GTR an unending source of pure frustration, played on anything but "arcade mode," which eventually you would want to get past. For racing fans, as of this moment, this is the ultimate challenge. I bought Forza Motorsport for Xbox and I've got a 53" HDTV and great surround sound - but I can't even get myself to touch it again. GTR has ruined my appreciation of just about everything else in the genre.