Get 80 attribute points 
To play the game with the most skill points (80) available, you can do this in single 
player easily by creating a profile named "SafariTK". This profile can't be played 
online. 

Unlock All Courses 
At the title screen enter: Hold L+R triggers then press X + Y 

Distance ball:
Complete the Putting Budget Skill Event in the Champion Tour in career mode.

Spin ball:
Complete the Water Hazard Course Skill Event in the Pro Tour in career mode.

Spin/Distance ball:
Complete the 1964 British Open Skill Event in the Medal Tour in career mode.

Medium graphite club:
Complete the Par Or Better Skill Event in the Champion Tour in career mode.

Soft graphite club:
Complete the 1990 British Open Skill Event in the Pro Tour in career mode.

Stiff graphite club:
Complete the 1978 PGA Championships Skill Event in the Medal Tour in career 
mode.

Medium steel club:
Complete the Bogie Or Better Skill Event in the Pro Tour in career mode.

Stiff Steel club:
Complete the 1983 U.S. Open Skill Event in the Champion Tour in career mode.

Unlockable courses and covers:
New South Wales course: Collect 14 golf balls in challenge mode.
8-Ball ball cover: Collect 15 golf balls in challenge mode.
Bunny ball cover: Collect 15 golf balls in challenge mode.
Silver challenge mode: Collect 15 golf balls in challenge mode.
Copper ball cover: Collect 15 golf balls in challenge mode.
Death ball cover: Collect 15 golf balls in challenge mode.
Oakmont course: Collect 38 golf balls in challenge mode.
Gold challenge mode: Collect 40 golf balls in challenge mode.
Feathery ball cover: Collect 40 golf balls in challenge mode.
Jester ball cover: Collect 40 golf balls in challenge mode.
Silver ball cover: Collect 40 golf balls in challenge mode.
Spiral ball cover: Collect 40 golf balls in challenge mode.
Loch Lomond course: Collect 60 golf balls in challenge mode.
Platinum challenge mode: Collect 70 golf balls in challenge mode.
Circus ball cover: Collect 70 golf balls in challenge mode.
Flame ball cover: Collect 70 golf balls in challenge mode.
Gold ball cover: Collect 70 golf balls in challenge mode.
Swirl ball cover: Collect 70 golf balls in challenge mode.
St. Andrews course: Collect 85 golf balls in challenge mode.
Platinum ball cover: Collect 96 golf balls in challenge mode.