2. Unlock the fifth generation: After completing the fourth generation, you will get a password. This password will allow you to unlock the fifth generation. In the game main menu, select the "Enter Code" option, and then enter the password you obtained.
3. Unlock the sixth generation: After completing the fifth generation, you will get a password again. This password will allow you to unlock the sixth generation. In the game main menu, select the "Enter Code" option, and then enter the password you obtained.