Unexplored land info:
Hold the left mouse button when getting ready to move a unit. Now move the unit
over the map grid. As it passes over each square, you’ll get information – even
if the square is unexplored.

Cheat Mode:
During gameplay, press Ctrl+K to enter the map editor. Now enter the following:

Shift F1	Create unit               
Shift F2	Discovery technology
Shift F3	Switch sides and reset view           
Shift F4	Edit energy credits
Shift F5	Change year
Shift F6	Kill opponent
Shift F7	View replay 
Shift F8	View FMV sequences 
Shift F9	Edit Faction diplomacy                                                 
Y		Full map 

Thanks to Revolution reader Kyle Hrebik!