Move every single unit during a turn except for one unit. Now, save
the game and quit. When you restart that game, all units that you
have moved can move again.
Randomize Enemy Stats:
While playing, press ALT-R to randomise the enemy leaders' stats.
Note that this could make them stronger.
While playing, hold Shift + 5 + 6, then release these buttons and
click anywhere on the map. If you did this right it will reveal the
Reveal Map and Control Enemy Cities:
Hold SHIFT then press 1, 2, 3, 4, 5, 6, 7. This will reveal the
entire map and all enemy cities. It also enables you to click on
enemy cities and sell their buildings or defortify their troops.