A series of off-road races. As you progress and level up in the "Cross Country Series" more tracks will be unlocked. The final track "The Titan" will be unlocked when you reach 8th tier.
Vehicles that can be unlocked after reaching the following tiers:
Tier 1 - City Outskirts Cross CountryTier 2 - Arthur's Seat Cross CountryTier 2 - Beach View Cross CountryTier 3 - Riverbank Cross Country CircuitTier 3 - Whitewater Falls Cross CountryTier 3 - Windmill Cross CountryTier 4 - Ambleside Loop Cross CountryTier 4 - Ambleside Rush Cross CountryTier 4 - Quarry Cross Country CircuitTier 5 - Aerodrome Cross Country CircuitTier 5 - Castle Cross Country CircuitTier 5 - The Ridge Cross Country CircuitTier 6 - Coastal Rush Cross CountryTier 6 - North City Cross Country CircuitTier 6 - Rail Yard Cross Country CircuitTier 7 - Gardens Cross Country CircuitTier 7 - Glen Rannoch Cross CountryTier 7 - Mountain Foot Cross CountryTier 8 - The Titan