When you perform the indicated amount of 'Glory Moves' the corresponidng game mode will become an available option.

Unlock Fate of Atlantis (1992 PC game):
Perform 1 Glory Move

Unlock Multiplayer Combat Games:
Perform 3 Glory Moves

Unlock Tank Type in Multiplayer:
Perform 4 Glory Moves

Unlock Contdown Mode in Combat Arenas:
Perform 5 Glory Moves

Unlock Lao Che Lounge Arena in Combat Arenas:
Perform 6 Glory Moves

Unlock Top Score mode for Planes in Multiplayer:
Perform 7 Glory Moves

Unlock Top Score mode for Tanks in Multiplayer:
Perform 8 Glory Moves

Unlock Secret Store Arena in Combat Arenas:
Perform 9 Glory Moves

Unlock Pillars of the Earth Arena in Multiplayer:
Perform 10 Glory Moves

Unlock Harem Arena in Combat Arenas:
Perform 11 Glory Moves

Unlock City Fight arena in Multiplayer:
Perform 12 Glory Moves

Unlock Countdown mode for Planes in Multiplayer:
Perform 13 Glory Moves

Unlock Countdown mode for Tanks in Multiplayer:
Perform 14 Glory Moves

Unlock Odin's Mess Hall Arena in Multiplayer:
Perform 15 Glory Moves

When you have collected the indicated amount of Artifacts the corresponding Movie Trailer will become an available option.

Unlock Raiders of the Lost Ark Movie Trailer:
Collect 3 Artifacts.

Unlock Temple of Doom Movie Trailer:
Collect 10 Artifacts.

Unlock The Last Crusade Movie Trailer:
Collect 24 Artifacts.

Unlock The kingdom of the Crystal Skull Movie Trailer:
Collect 30 Artifacts.

When you have collected the indicated amount of Artifacts the corresponding Concept Art will become an available option.

Unlock Sudan:
Collect 2 Artifacts.

Unlock Co-Op Levels (Wii Only):
Collect 8 Artifacts.

Unlock Allies:
Collect 12 Artifacts.

Unlock San Francisco:
Collect 14 Artifacts.

Unlock Panama:
Collect 18 Artifacts.

Unlock Extras:
Collect 20 Artifacts.

Unlock Enemies:
Collect 22 Artifacts.

Unlock Nepal:
Collect 26 Artifacts.

Unlock Istanbul:
Collect 28 Artifacts.

Unlock Odin And Seabed:
Collect 32 Artifacts.

Unlock Cutting Room Floor:
Collect 36 Artifacts.

When you have collected the indicated amount of Artifacts the corresponding skin will become an available option.

Unlock Big Heads:
Collect 6 Artifacts.

Unlock Tuxedo Indiana Jones:
Collect 16 Artifacts.

Unlock Henry Jones:
Collect 34 Artifacts.

Unlock Han Solo (Wii Only):
Collect 36 Artifacts.

This feature becomes an available option at the 'Main' menu by holding down Z and pressing A, U, U, B, D, D, L, R, L, B.