Transport Tycoon Deluxe

Cheat mode:
Select the "Sign" option under the "Scenery/Trees" tab during game play. Place it anywhere on the map. Then, enter one of the following codes and press [Enter] to activate a corresponding cheat function. A small checkmark will appear to confirm correct code entry. Saving the game is recommended before any code is enabled in the event it causes unintended consequences.

Effect	Code
New "Subsidy" added to Subsidy list	Cht: Subsidy
Changes tracks; 1 = Rail, 2 = Monorail, 3 = Maglev. Enter just one number to change all tracks to that type	Cht: Tracks <from number> <to number>
Set year	Cht: Year <1921 to 2071>
All train engines for current time unlocked at buy screen	Cht: AllEngines
All vehicles for current time unlocked at buy screen	Cht: AllVehicles
Money	Cht: Money <1 to 100000000>
Remove unused vehicles from buy screen	Cht: RemoveVehicles
Remove your HQ1	Cht: RemoveHQ
Reset all cargo and ratings of all your stations, excluding the AI	Cht: ResetStation
Reset all cargo and ratings of all your stations, including the AI	Cht: ResetStation 1
Show all general statistics for current game	Cht: Debugger
Start all vehicles on map	Cht: StopAll 1
Stop all vehicles on map	Cht: StopAll 2

^{1. If your HQ has grown in size, removing it and replacing it will cause it to never expand anymore.}

Eliminate CPU buses:
Build a snaking railroad line over the bus route. The train will destroy the CPU buses, but will also eliminate your own trucks and buses.

Eliminate CPU airplanes:
Build a tree covered tall hill at the end of the CPU's runway.

Fast population:
When creating a city, put down a large city, start expanding it, take out all the small houses, and keep expanding. When it takes a lot of clicks before it increases population (usually around 30,000), put a small city as close as possible, even if it touches. Then, delete the small city and the large city's population will stay the same even though a portion of the city itself was erased. This may be repeated until about 70,000, at which point it will revert back to 0.
Dennis Carlson.

Hint: Faster loading and unloading of trains:
If you have a long train that takes a long time at stops, make sure you have a train orientation depot on your track. When it stops at a station, let it unload/load at a station, then press the button with a train on it. Then the train that is at the stop. Press the button to turn it around if needed, then finally press the button that takes the train to the depot twice, It will leave the stop and go to the next one.
Rada Brodowski.

Hint: Destroy opponent road vehicles:
Over a road where your opponents' road vehicles travel, build two railroad tracks that are connected on the road. On one side, build a train depot and buy a train. Have the train stop over the tracks so that the road vehicles stop at the flashing lights. Then, reverse the direction of the train and let it go. As soon as the lights stop blinking and a truck is on the tracks, reverse direction of the train again. If done correctly, the train will hit and blow up the vehicle. Note: Some vehicles will not move until other hit trucks are cleared off the tracks.
GarfieldFreak11.

Hint: Easy money:
Start a new game on desert. Select MegaRail 1960 then set your company up. Put your loan money up to the maximum then go to the company list. Buy 75% of the company. When the money of the company is in the negatives, the company will be sold off and declared bankrupt. Keep the company called "Parker and Co." on the screen. When the company is declared bankrupt, sell 75% of the company. You will then be a millionaire. Your company value will increase to about $65,666,000 and your money will be at about $60,000,000. Remember to pay back your loans.
Johnathon Weaver.

Create a scenario with five cities; four on the corners, and one in the middle. When creating the cities, leave enough room for a large airport directly in the middle. When you select the scenario, build an airport in each city and have a plane go to all of the airports. You should be getting a lot of money at this point. The more planes, the more money.
Soccergoals4u.

Hint: Eliminate CPU trains:
Build a train depot at the end of the track of a CPU's train station. Build a train, and as the CPU's train pulls into the train station to load/unload, release your train by hitting start and the lights button (to ignore signals). This is an easy and fast way to destroy all the CPU's trains. The CPU will "give-up", then remove most tracks and stations.
nfn17353.

Glitch: Flashing lights:
Build two connected railroad tracks over a road. Build a depot on the side of the track that is not on the road. Buy a train and let it go. Get the train on the track over the road and reverse it a few times to keep the lights on. Then, let the train go to the end of the track. It will turn around automatically. Send it to the depot, sell it, and destroy the depot. If done correctly, the lights will be flashing with no train.
GarfieldFreak11.