Dani's Race

To replace GTA 3 you can use Dani's Race since it respects the user's freedom and is also a Open World Game software, Racing Game software, Third Person Game software and Sandbox Game software.

Chatroom Source code Website

Rigs of Rods

To replace GTA 3 you can use Rigs of Rods since it respects the user's freedom and is also a Racing Game software, Sandbox Game software and Open World Game software.

Source code Website

Veloren

To replace GTA 3 you can use Veloren since it respects the user's freedom and is also a Open World Game software and Third Person Game software.

Source code Website

SuperTuxKart

To replace GTA 3 you can use SuperTuxKart since it respects the user's freedom and is also a Racing Game software.

Source code Website

Speed Dreams

To replace GTA 3 you can use Speed Dreams since it respects the user's freedom and is also a Racing Game software.

Source code Website Wikipedia