Moto GP: Ultimate Racing Technology 2006 (X360)

50th Anniversary bike (red/white/green)
Set your season to 2005 under the "Season" option. Then, win a Quick Race with Valentino Rossi at Valencia to unlock the 50th Anniversary bike (red/white/green).

50th Anniversary bike (yellow/white with black bar stripe)
Set your season to 2005 under the "Season" option. Then, win a Quick Race with Valentino Rossi at Laguna Seca to unlock the 50th Anniversary bike (yellow/white with black bar stripe).

Achievements
Here are the 360 Achievements that can be unlocked by completing the tasks below, the pts after the - sign is the amount of points you earn for each:

Challenge Expert - 30 pts
50 challenges completed

Challenge Master - 60 pts
All challenges completed

Extreme Bike Collector - 50 pts
Purchase all extreme bikes

GP Champion - 60 pts
Win career mode grand prix season on champion difficulty

GP Professional - 30 pts
Win a career mode grand prix season on pro difficulty

GP Legend - 100 pts
Win a career mode grand prix season on legend difficulty

Seeded #1 - 75 pts
Seed #1 achieved

Seeded #10 - 50 pts
Seed #10 achieved

Seeded #25 - 30 pts
Seed #25 achieved

Seeded #50 - 20 pts
Seed #50 achieved

Seeded #75 - 15 pts
Seed #75 achieved

Seeded #90 - 10 pts
Seed #90 achieved

Stunt Mode Rider - 10 pts
Win a Stunt Mode game in any multiplayer mode

Extreme Mode Champion - 10 pts
Win any extreme mode championship at any difficulty

Extreme 1000 - Legend - 60 pts
Win a career mode extreme 1000 season on legend difficulty

Extreme 1200 - Champion - 50 pts
Win a career mode extreme 1200 season on champion difficulty

Extreme 1200 - Legend - 75 pts
Win a career mode extreme 1200 season on legend difficulty

Extreme 1200 - Professional - 25 pts
Win a career mode extreme 1200 season on pro difficulty

Extreme 600 - Legend - 30 pts
Win a career mode extreme 600 season on legend difficulty

Accredited - 100 pts
All rider credits awarded

GP Rookie - 10 pts
Win a career mode grand prix season on rookie difficulty

50 Races (50)
Play 50 races online or offline.

Extreme mode 600cc-1200cc
Repeat all seventeen tracks to unlock more Extreme mode tracks.

Quick Race Extreme mode and tracks
Win a Quick Race in GP mode with Valentino Rossi to unlock Quick Race Extreme mode and tracks.

USA Extreme bike
At the "Game Mode" screen, press Right, Up, B(2), A, B, Up, B(2), A to unlock the USA Extreme bike.