.\"                                      Hey, EMACS: -*- nroff -*-
.\" Please adjust this date whenever revising the manpage.
.Dd August 12, 2023
.Dt OPENTTD 6
.Os
.Sh NAME
.Nm openttd
.Nd open source clone of the Microprose game \(lqTransport Tycoon Deluxe\(rq
.Sh SYNOPSIS
.Nm
.Op Fl efhQxX
.Op Fl b Ar blitter
.Op Fl c Ar config_file
.Op Fl d Op Ar level | Ar cat Ns = Ns Ar lvl Ns Op , Ns Ar ...
.Op Fl D Oo Ar host Oc Ns Op : Ns Ar port
.Op Fl g Op Ar savegame
.Op Fl G Ar seed
.Op Fl I Ar graphicsset
.Op Fl l Ar host Ns Op : Ns Ar port
.Op Fl m Ar driver
.Op Fl M Ar musicset
.Op Fl n Ar host Ns Oo : Ns Ar port Oc Ns Op # Ns Ar company
.Op Fl p Ar password
.Op Fl P Ar password
.Op Fl q Ar savegame
.Op Fl r Ar width Ns x Ns Ar height
.Op Fl s Ar driver
.Op Fl S Ar soundset
.Op Fl t Ar year
.Op Fl v Ar driver
.Sh OPTIONS
.Bl -tag -width "-n host[:port][#company]"
.It Fl b Ar blitter
Select the blitter
.Ar blitter ;
see
.Fl h
for a full list.
.It Fl c Ar config_file
Use
.Ar config_file
instead of
.Pa openttd.cfg .
.It Fl d Ar [level]
Set debug verbosity for all categories to
.Ar level ,
or 1 if omitted.
.It Fl d Ar cat Ns = Ns Ar lvl Ns Op , Ns Ar ...
Set debug verbosity to
.Ar lvl
for a specific category
.Ar cat .
.It Fl D Oo Ar host Oc Ns Op : Ns Ar port
Start a dedicated server.
.Pp
Network debug level will be set to 6.
If you want to change this, set
.Fl d
after setting
.Fl D .
.It Fl e
Start in world editor mode.
.It Fl f
Fork into background (dedicated server only, see
.Fl D ) .
.It Fl g Op Ar savegame
Load
.Ar savegame
at start or start a new game if omitted.
.Ar savegame
must be either an absolute path or one relative to the current path or one of
the search paths.
.It Fl G Ar seed
Seed the pseudo random number generator with
.Ar seed .
.It Fl h
Display a summary of all options and list all the available AIs, blitters,
sound, music and video drivers, graphics sets and sound sets.
.It Fl I Ar graphicsset
Select the graphics set
.Ar graphicsset ;
see
.Fl h
for a full list.
.It Fl l Ar host Ns Op : Ns Ar port
Redirect debug output; see
.Fl d .
.It Fl m Ar driver
Select the music driver
.Ar driver ;
see
.Fl h
for a full list.
.It Fl M Ar musicset
Select the music set
.Ar musicset ;
see
.Fl h
for a full list.
.It Fl n Ar host Ns Oo : Ns Ar port Oc Ns Op # Ns Ar company
Join a network game, optionally specifying a port to connect to and company to
play as.
.It Fl p Ar password
Password used to join server.
Only useful with
.Fl n .
.It Fl P Ar password
Password used to join company.
Only useful with
.Fl n .
.It Fl q Ar savegame
Write some information about the specified savegame and exit.
.It Fl Q
Don't scan for/load NewGRF files on startup.
.Pp
Passing
.Fl Q
twice (so,
.Fl QQ
) will disable NewGRF scanning/loading entirely.
.It Fl r Ar width Ns x Ns Ar height
Set the resolution to
.Ar width
\(mu
.Ar height
pixels.
.It Fl s Ar driver
Select the sound driver
.Ar driver ;
see
.Fl h
for a full list.
.It Fl S Ar soundset
Select the sound set
.Ar soundset ;
see
.Fl h
for a full list.
.It Fl t Ar year
Set the starting year to
.Ar year .
.It Fl v Ar driver
Select the video driver
.Ar driver ;
see
.Fl h
for a full list.
.It Fl x
Do not automatically save to config file on exit.
.It Fl X
Do not use global folders to search for files.
.El
.Sh SEE ALSO
.Lk https://wiki.openttd.org "Wiki"
(includes community maintained manual),
.Lk https://forum.openttd.org "Forum",
.Lk https://www.openttd.org "News"
.Sh HISTORY
Transport Tycoon Deluxe was written by Chris Sawyer and published by Microprose.
.Nm
is a free reimplementation.