This is a cool way to cause major destruction without having to leave your influence ring, and it's really simple. After you've created an Alter and have purchased a spell (ex. Fire) Then, as if you were tossing a tree or rock, you can hurl the fireball through the air. This causes a lot of chaos and easily starts forest fires. This also kills people fairly easily, so fair warning, you could kill a bunch of your people by accident. Also, this isn't very accurate, and could take some time to get used to.
Easy and Fun Defense
When playing in any level and your wall's are built, make sure your influence ring is outside the wall's. Next find a couple of massive rock's and boulders and leave them outside your wall near the gate. When the enemy is attacking and standing still outside the gate pick up the rocks and drop them on the enemy. it's an easy defense and also a fun way to keep your enemy's at bay!
If you take over a town by force, quickly drag out some walls to surround the town, then leave. This will allow the enemy to take the town back, but that's fine because the enemy villagers will happily build the walls you've laid out, locking themselves inside (and often enemy military units too) then you can deal with the town at your leisure.
Pet: Good or Bad
To make your pet good or bad a helpful tool is the toy you give it. For a good pet he will need to have a teddy bear, and for a bad pet you will need a vodoo doll. These can both be purchased through the Tribute Menu (F4).
Have your pet pick up a tree or rock (you can do this by clicking him once to toggle leash and then clicking once on a rock or tree). After he has the tree or rock in his hands click on him, he will then begin to "pump some iron" as my Wolf put it in game. For greater effect have him eat alot before to burn off the fat.
The only thing you need for this is a wall with a gatehouse and your influence must reach beyond it. Keep it open at all times, just pay attention. Whenever an enemy force charges your city, wait till they enter your influence and then close the gates. After that the computer will stand still, within your influence. This leaves you the chance to destroy them without any effort. (e.g. use Meteor on them).
You can change the time of day/night in this game and its not obvious on how to do it as i don't think its in the instructions book. What you do is zoom right out and look up so you can see the horizon, then put your hand above the horizon as if you're putting your hand in the sky and click and hold then a clock should appear.... you can alter the time by turning the clock hand to the time of day you want! This is useful for attacking at night or letting you see better in the daylight!
This isn't much of a cheat, but, it's fun to mess around with. At the begining, when the developer titles and names are coming up, the Lionhead logo will come up, in a small box with little beads will come up, you can move this around if you click and hold it with the cursor. Although be warned, if you stop clicking it will freeze into the Lionhead real logo.