Climax knows a thing or two about speed, but the team has outdone itself this time by delivering a new game on a new console less than a year after the release of MotoGP 3. The short development cycle is definitely apparent in that MotoGP 06 is less a significant step forward for the series than an incremental upgrade to the previous game. However, given that the previous game is one of the best racing titles on the Xbox, that's certainly not a bad deal for racing fans. When it comes down to it, MotoGP 06 is not without its flaws, and the increased price is tough to swallow. But where the rubber meets the road, this is still a great game that will keep racing fans coming back for a very long time.
MotoGP 06 has two distinct race circuits, the Grand Prix circuit and the Extreme circuit. If you're looking for a sim racing experience, you can race on one of 17 real-world GP tracks against riders from the 2005 or the 2006 MotoGP season. You can race these tracks in quick race, time trial, or career mode. If you're playing single-player, there are four different difficulty modes to choose from, although if you're a series veteran, you'll need to skip the easiest two settings and go straight to "champion" if you want any sort of a challenge. Even then, the challenge in racing the Grand Prix tracks comes from the tight layouts that demand a lot of technical skill when choosing your lines to maintain as much speed as possible throughout the many difficult hairpins and chicanes you'll encounter.
If the Grand Prix circuit is a bit too technical for your taste, you can try out any of the three divisions of the Extreme circuit. There are 17 fictional extreme courses in the game, and you can race them on 600cc, 1000cc, or 1200cc bikes. As the bike size increases, the tracks become more difficult because the larger bikes are much faster, heavier, and more difficult to control. In comparison to the GP tracks, the extreme tracks require much less technical skill and instead reward a heavy hand on the accelerator. These tracks are so fast that you rarely have to use the brakes at all, and it can be a blast to open up the throttle in the long straights and wide, sweeping turns.
Source : gamespot