From #openttdcoop wiki
GRFs are small extensions to OTTD's graphics and gameplay. A GRF could be a new bridge type, a whole new trainset or a new cargo type. #openttdcoop is using a compilation of GRFs to make our gameplay even more addictive.
#openttdcoop NewGRF package
#openttdcoop uses a certain set of additional GRFs. You will both need them to play on the Public Server as well on the Pro Zone. To ease things up, we packed the GRFs needed into one single file. The GRFs used will depend on the current game, and can often be gotten through BaNaNaS, the in-game content download system, accessible by clicking the GRF Settings button in the Game Info section of the server list. If you are still missing GRFs, try downloading the most recent GRF pack put together by the community here at #openttdcoop, being sure to unzip them into the newgrf folder in the folder you installed the game to.
The GRFs, which are included or used are listed here (GRF Table).
Notes: It is very well possible, you will still have NewGRF conflicts while you try to join our server or loading a archive game, please use BaNaNaS for the missing ones We won't update our pack that often anymore, since you can download the newest versions directly from the ingame content service.
Hint: If the page does reload again, try another format...
Version 8.0 (2010-08-04)
- 7-zip: Download (~17 MB)
- zip: Download (~22 MB)
- tar.gz: Download (~22 MB)
- tar.bz2: Download (~22 MB)
You can also browse the download directory.
Check the GRF History for details on the changes.
Suggestions and updates for next Versions
Would you like to see a special GRF (set) or somthing else in the next versions? Please, post your suggestions on the discussion page.
Non #openttdcoop Servers, which also use our pack
Base GRFs and Sound
You need the Base GRFs and a Sounds file for the game, the original base graphics from TTD aren't available for free, still. But you can get replacment graphics and sound from here:
check the readme to find location for installation