Arctic Thunder

No drones mode:
---------------
Press Square(2), Circle(2), L1, R1, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

Expert mode:
------------
Press Circle, Square, Circle(2), Square, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

All Randoms mode:
-----------------
Press R1, R2, Square, Circle, R1, R2, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

All Atomic Snowballs mode:
--------------------------
Press Square(3), L1, Circle, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

All Grappling Hooks and Randoms mode
------------------------------------
Press Circle(2), L2, Circle(2), L1, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

All Rooster Tails mode
----------------------
Press R1, R2, L2, L1, Square, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

All Snow Bombs and Randoms mode
-------------------------------
Press Circle(2), R1, R2, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

All Boost mode
--------------
Press Circle, R1(2), Circle, R2, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

Clone mode
----------
Press L1, L2(2), Circle, L1, Circle, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

Everyone invisible mode
-----------------------
Press Square, Circle, Square, R2, Circle(2), Start at the screen after
startup (before choosing a player). Note: This has no effect in points
races.

No power-ups mode
-----------------
Press Square(2), Circle, Square, R2, Square, Start at the screen after
startup (before choosing a player). Note: This has no effect in points
races.

Super boost wheelie mode
------------------------
Press Circle, L1, Square, R2, Square, L2, Start at the screen after startup
(before choosing a player). Note: This has no effect in points races.

Mooing
------
Enter MOO as your initials after a race.

Snowman
-------
Win gold medals on all twelve tracks in race to unlock the Snowman
character.

All Snowmen Found bonus
-----------------------
Locate and run over all the snowmen on any given track to collect the
"All Snowmen Found" bonus; which awards 15,000 additional points.