OpenTTD supports modding the game via NewGRF plug-ins. NewGRFs can alter game play, can replace existing and introduce new graphics, 32bpp or 8bpp, normal and extra zoomed in (compared to the original game).



NewGRF development tools

NewGRF usage guide and NewGRF List

Documentation of NewGRF use and installation. Manual to alter the gameplay and graphics files using NewGRF.
And a list of some major NewGRFs.



Player info

FAQ 32 bit graphics
Playing with 32 bpp graphics

Developer/artist info

32bit Graphics Development - project home
Suggestions for 32bit Graphics Developers
32bpp Graphics

32bpp NewGRFs (subproject)

Developing 32bpp NewGRFs

Archive / History