NBA Live '99 Cheats for PC - Windows

Bonus teams:
Enter the "Rosters" screen and select the "Create Custom Team" option:

EA - Europals
TNT - Blasters
Hitmen - Coders
Hitmen - Earplugs
Hitmen - Rebounds
Hitmen - Idlers
Hitmen - Pixels

Internet configuration:
Type ilovelag at the main screen, then click on the "Multiplayer" option.

Practice court:
Type Playground at the controller setup screen.

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NBA Live '99 Items