The Demo contains:
Free Roam (Beacon Hill)

Outrun Race
Circuit (one event - accessible in world)
Downhill Drift (one event - accessible in world)
Stores (Car Lot, and Specialty Shop)

Quick Race
Downhill drift (same track as in free roam)
Circuit (same track as in free roam)

Online (full server, no LAN)
Downhill drift (same track as in free roam)
Circuit (same track as in free roam)
Cars
Player car - Nissan 350Z Preview

Performance Shop
Body Shop
Car Lot
Graphics Shop
Car Specialties Shop
The Full Game Contains:

Story Mode featuring Brooke Burke
A huge free-roaming environment that is 5x larger than the previous Underground
Over 150 race events and more than 180 tracks
ver 30 cars including tuners, spots, SUV's and modern muscle cars. Customize up to 5 street machines in your career garage.
Deep Visual Customization:
o Authentic visual customization with DOUBLE the parts than the previous Underground
o All-new specialty upgrades including scissor doors, spinners, audio systems, custom gauges, split hoods and hydraulics
Detailed Performance Tuning
o Buy over 50 individual performance parts for your car
o Custom Tune over 20 different settings including Springs, Shocks, Sway Bars, Ride Height, Turbo, Brake Bias, ECU, Tire Grip, Nitrous Oxide, and Gear Ratios
o Test your tuned settings with dyno runs and real-time performance tweaks for immediate feedback
5 distinct neighborhoods:
o City Center
o Coal Harbor
o Beacon Hill
o Jackson Heights
o Airport

Game Modes
o Circuit
o Sprint
o Street-X
o Outrun
o Underground Racing League
o Drag
o Drift
o Team Drift
o Downhill Drift
o Showcase