Открыть все:
В папке с игрой найдите файл motogp.cfg и добавьте в него следующие строки:
game/unlock_all_challenges = true
game/unlock_all_riders = true
game/unlock_championships = true
game/unlock_liveries = true
game/unlock_tracks = true
game/unlock_us_secret_rider = true
game/unlock_videos = true


Изменение сложности игры:
В этой же файле (motogp.cfg) можно менять параметры сложности 
каждого из уровней изменяя сложность игры 
(приведено по умолчанию, а в скобках мин и макс значения):

/ai/grouping/1;easy/a1;max_speed = 0.65             ( 0.0,1.0 )
/ai/grouping/1;easy/a2;min_speed = 0.37             ( 0.0,1.0 )
/ai/grouping/1;easy/b1;max_speedup = 0.025          ( 0.0,1.0 )
/ai/grouping/1;easy/b2;min_speedup = 0.0125         ( 0.0,1.0 )
/ai/grouping/1;easy/c1;min_slowdown = 0.05          ( 0.0,1.0 )
/ai/grouping/1;easy/c2;max_slowdown = 0.1           ( 0.0,1.0 )
/ai/grouping/1;easy/d1;max_accel = 0.2              ( 0.0,1.0 )
/ai/grouping/1;easy/d2;min_accel = 0.2              ( 0.0,1.0 )
/ai/grouping/1;easy/e1;min_player_slowdown = 0.4    ( 0.0,1.0 )
/ai/grouping/1;easy/e2;max_player_slowdown = 0.4    ( 0.0,1.0 )
/ai/grouping/1;easy/f;player_speedup = 0.0          ( 0.0,1.0 )
/ai/grouping/2;medium/a1;max_speed = 0.73           ( 0.0,1.0 )
/ai/grouping/2;medium/a2;min_speed = 0.55           ( 0.0,1.0 )
/ai/grouping/2;medium/b1;max_speedup = 0.05         ( 0.0,1.0 )
/ai/grouping/2;medium/b2;min_speedup = 0.025        ( 0.0,1.0 )
/ai/grouping/2;medium/c1;min_slowdown = 0.025       ( 0.0,1.0 )
/ai/grouping/2;medium/c2;max_slowdown = 0.05        ( 0.0,1.0 )
/ai/grouping/2;medium/d1;max_accel = 0.4            ( 0.0,1.0 )
/ai/grouping/2;medium/d2;min_accel = 0.4            ( 0.0,1.0 )
/ai/grouping/2;medium/e1;min_player_slowdown = 0.3  ( 0.0,1.0 )
/ai/grouping/2;medium/e2;max_player_slowdown = 0.4  ( 0.0,1.0 )
/ai/grouping/2;medium/f;player_speedup = 0.2        ( 0.0,1.0 )
/ai/grouping/3;hard/a1;max_speed = 0.85             ( 0.0,1.0 )
/ai/grouping/3;hard/a2;min_speed = 0.8              ( 0.0,1.0 )
/ai/grouping/3;hard/b1;max_speedup = 0.05           ( 0.0,1.0 )
/ai/grouping/3;hard/b2;min_speedup = 0.1            ( 0.0,1.0 )
/ai/grouping/3;hard/c1;min_slowdown = 0.05          ( 0.0,1.0 )
/ai/grouping/3;hard/c2;max_slowdown = 0.1           ( 0.0,1.0 )
/ai/grouping/3;hard/d1;max_accel = 0.9              ( 0.0,1.0 )
/ai/grouping/3;hard/d2;min_accel = 0.9              ( 0.0,1.0 )
/ai/grouping/3;hard/e1;min_player_slowdown = 0.2    ( 0.0,1.0 )
/ai/grouping/3;hard/e2;max_player_slowdown = 0.2    ( 0.0,1.0 )
/ai/grouping/3;hard/f;player_speedup = 0.4          ( 0.0,1.0 )
/ai/grouping/4;legend/a1;max_speed = 0.95           ( 0.0,1.0 )
/ai/grouping/4;legend/a2;min_speed = 0.85           ( 0.0,1.0 )
/ai/grouping/4;legend/b1;max_speedup = 0.05         ( 0.0,1.0 )
/ai/grouping/4;legend/b2;min_speedup = 0.1          ( 0.0,1.0 )
/ai/grouping/4;legend/c1;min_slowdown = 0.05        ( 0.0,1.0 )
/ai/grouping/4;legend/c2;max_slowdown = 0.1         ( 0.0,1.0 )
/ai/grouping/4;legend/d1;max_accel = 1.0            ( 0.0,1.0 )
/ai/grouping/4;legend/d2;min_accel = 1.0            ( 0.0,1.0 )
/ai/grouping/4;legend/e1;min_player_slowdown = 0.0  ( 0.0,1.0 )
/ai/grouping/4;legend/e2;max_player_slowdown = 0.0  ( 0.0,1.0 )
/ai/grouping/4;legend/f;player_speedup = 1.0