All: LEFT, X, LEFT, X, LEFT
Angus: LEFT, X, RIGHT, X, UP
Arsenault: LEFT, Y, UP, Y, DOWN
Boomer: LEFT, Y, LEFT, X, UP
Dante: LEFT, X, RIGHT, Y, LEFT
Djimon: LEFT, Y, DOWN, Y, UP
Duke: LEFT, Y, UP, X, RIGHT
El Diablo: LEFT, X, RIGHT, X, DOWN
Half-Pint: LEFT, Y, UP, X, UP
Kahuna: LEFT, Y, RIGHT, Y, RIGHT
Kaimani: LEFT, X, DOWN, X, DOWN
Kiril: LEFT, Y, UP, X, LEFT
Lola: LEFT, X, LEFT, Y, DOWN
Madeira: LEFT, Y, DOWN, X, UP
Nova: LEFT, Y, DOWN, Y, RIGHT
Raine: LEFT, X, UP, X, UP
Rico: LEFT, X, RIGHT, X, RIGHT
Rumiko: LEFT, Y, LEFT, Y, UP
Zari: LEFT, Y, LEFT, Y, RIGHT

Sega Soccer Slam Unlock Stadiums
To unlock the stadiums listed below, enter the button code at the main title screen:

All: R, R, RIGHT, RIGHT, UP, UP, UP, UP, UP, X, X
Alpen Castle: UP, UP, UP, DOWN, X, X
Jungle Canopy: L, R, UP, DOWN, LEFT, RIGHT, X, Y
Pacific Atoll: UP, UP, LEFT, LEFT, Y, Y,
Reactor Core: UP, LEFT, LEFT, RIGHT, X, Y
Riviera Ruins: UP, DOWN, DOWN, RIGHT, Y, X
Tribal Oasis: L, R, UP, UP, DOWN, DOWN, X, X

Sega Soccer Slam Unlock Alternate Teams
To unlock the alternate teams, go to the title screen and enter the correspoding button code.

All: L, R, DOWN, RIGHT, X, Y
El Fuego: X, X, DOWN, DOWN, RIGHT, LEFT
Spirit: Y, Y, DOWN, DOWN, LEFT, RIGHT
Subzero: Y, Y, DOWN, RIGHT, LEFT, UP, UP
Toxic: Y, X, DOWN, UP, UP
Tsunami: X, Y, DOWN, UP, RIGHT, LEFT
Volta: Y, X, DOWN, UP, DOWN, UP

Sega Soccer Slam Unlock Film Modes
To unlock these film modes, go to the title screen and enter the corresponding code:

Modern film mode: Y, X, Y, X, Y, X, RIGHT, LEFT, RIGHT, LEFT, RIGHT
Classic film mode: X, Y, X, Y, X, Y, LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT

Sega Soccer Slam Unlock Different Balls
To play with one of the wacky balls listed below, go to the title screen and enter the corresponding button code: