myhost% openttd 
Your 'sample.cat' file is corrupted or missing!
Your 'nsignalsw.grf' file is corrupted or missing!
Your '2ccmap.grf' file is corrupted or missing!
Your 'airports.grf' file is corrupted or missing!
Your 'autorail.grf' file is corrupted or missing!
Your 'canalsw.grf' file is corrupted or missing!
Your 'elrailsw.grf' file is corrupted or missing!
Your 'openttd.grf' file is corrupted or missing!
Your 'trkfoundw.grf' file is corrupted or missing!
Error: No available language packs
openttd: openttd.c:88: error: Assertion `0' failed.