Unlock All Areas
To unloack all areas first You have to create a new profile called "AccessAllAreas". You can also use Notepad to edit preferences.txt file located in the game folder and add the following line (without the quotes): "UserProfile = AccessAllAreas".
Map editor and mod player
Place "ModSystemEnabled = 1" in your preferences file of the root folder of Darwinia. Then start up game and hit [Escape], there will be a new menu item called "MODS".
Unlock MODS and Map Editor
Complete the game and You'll unlock it.
Change the system date to December 25th and start the game. Snow will appear, and some Darwinians will have Santa hats.