Build a long tunnel the length of the screen so that it costs more than 2 billion dollars, because of a bug in the original version this will give you 2 billion dollars.

Sim City 2000

Type in CASS to get a small amount of money, but beware, for if you type it in more than twice a month you will get a fire storm.

Type in PORN to hear a guy say "I can't get enough!"

Type in VERS to see what version of SC 2000 you own.

Type in MEMY to see how much free memory you have.

Type in DAMN, DARN, HELL, or HECK and all you residential zones
will form into churches (Don't do this cheat, for there is no way reverse the
process).

To get 500,000 and all the rewards Click on the toolbar like you were going
to move it and then type BUDDAMUS.

If you have a MAC, just type in PORNTIPSGUZZARDO and you will become 500,000
dollars richer! Do it as much as you wish.
 

This cheat works early in your city. When industrial, commercial, or residential
drops to zero or into the negative, save your city. Then reopen the city from
FILE. After one month passes BANG, your demand shoots up. If that's not
enough for you, do it again and BANG, all three get another shot in the arm.
 

Here is a way to fool Sim City 2000 into thinking you always have a water surplus and make those water shortage messages go away. Before you add any water pumps to your
city, do the following:

1. Pick an area on the outskirts of your city and de-zone
a 3x3 grid

2. Place a single water pump in the center of this grid

3. Connect the water pump to power

4. DO NOT connect any pipes to this pump

Now go back to building your city. Pretty soon you will
see the water shortage messages go away and if you open
your graph window and select water, you will see that
the line has shot up to maximum capacity.
 
 

One of the undocumented features of Sim City 2000 is the ability to "erase" a structure that you have built and then be able to reuse that land space while still
retaining the population values from the original structure. I have been able to use this technique to
"erase" 140 Launch Arcos and rebuild over the reclaimed land space. When to use the query tool, the sim still tells you it "sees" an arco. Here's how you do it:

1. Make a backup copy of your city in case you mess up
2. Click on the water/tree icon
3. Select trees
4. Hold down the shift key and the left mouse button
5. Slowly drag the mouse cursor over the tiles you want
to erase while continuing to hold down the shift key
and depressing the mouse button. You will see your
structures "disappear".
6. Make frequent use of the rotate view tool to make sure
you only erase the tiles you have selected
7. If you release the shift key or mouse button by mistake,
go back to step 2 and start over.

Heroes of Might and Magic II

Veiw the entire map = 8675309
Get 5 black dragons each time you type this in = 32167
Win the game with = 911
 Lose the game with = 1313
Skip a campaign level with = 1911
See your enimies = 89901
Get gold with = 101111
Get ore with = 844691
Get crystals with = 844690

Starcraft

Power overwhelming - God Mode
Show me the money -  Gives you 10,000 gas and 10,000 crystal
Operation CWAL -       Speeds construction of buildings and units
The Gathering -           Gives unlimited energy to all casting units
Game over man -         Ends your game as a loss
Staying Alive -             Prevents the mission from ending due to victory or defeat
There is no cow level - Completes the current mission
Whats mine is mine -    Free minerals
Breathe deep -             Free Vespene Gas
Something for nothing -Gives all upgrades
Black Sheep Wall -       Shows entire map
Medieval man -            Free upgrades to units
Modify the phase variance - Ability to build all buildings
War aint what it used to be - Disables fog of war
Food for thought -        Ability to build units beyond the support limit
Ophelia -                      Enter this to enable level skipping cheat. Then enter the mission you want
                                   to skip to (i.e., "terran10") to go there.