Unlock All Areas
To unloack all areas, 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. Start up game and hit [Escape], there will be a new menu item called "MODS".
Hints
Unlock MODS and Map Editor
Complete the game.
Christmas theme
Change the system date to December 25th and start the game. Snow will appear, and some Darwinians will have Santa hats.