OpenTTD: How to Install the DOS Graphics & Sound Effects & Music

Look into the folder of the original game. You are looking for:
TRG1.GRF
TRGC.GRF
TRGH.GRF
TRGI.GRF
TRGT.GRF

Once you have found these 5 files, just copy them into the same folder, where openttd.exe is. Afterwards, launch the game, go to game options, Base graphics Set, and select ‘original_dos’!

Look into the folder of the original game. You are looking for a file called: sample.cat

Once you found the file, copy it into the ‘baseset’ folder in your openttd directory. Then launch the game, go to game options, Base sounds set, and select ‘original_dos’!

Okay, this is probably the hardest part, but bear with me. Depending on which version of the game you have (DOS/WINDOWS), its going to be different.

First of all, create a folder called ‘gm’ in the root directory of the game (where openttd.exe is).

If you have the DOS version, then you need to locate ‘GM.CAT’, and copy it into the ‘gm’ folder you just created. Launch the game as before, game options, Base music set, and select ‘original_dos’!

If you have the WINDOWS version, find the ‘gm’ folder in your original copy of the game, copy the files inside into your ‘gm’ folder that you just created. Launch the game, go into game options, Base music set, and select ‘original_windows’!

In my experience, the windows soundfiles are slightly louder, but thats the only real difference between them, as far as i can tell