<s>
A	O
train	B-Language
simulator	I-Language
(	O
also	O
railroad	B-General_Concept
simulator	I-General_Concept
or	O
railway	B-General_Concept
simulator	I-General_Concept
)	O
is	O
a	O
computer	O
based	O
simulation	O
of	O
rail	O
transport	O
operations	O
.	O
</s>
<s>
They	O
are	O
generally	O
large	O
complicated	O
software	O
packages	O
modeling	O
a	O
3D	O
virtual	B-Application
reality	I-Application
world	O
implemented	O
both	O
as	O
commercial	O
trainers	O
,	O
and	O
consumer	O
computer	O
game	O
software	O
with	O
'	O
play	O
modes	O
 '	O
which	O
lets	O
the	O
user	O
interact	O
by	O
stepping	O
inside	O
the	O
virtual	O
world	O
.	O
</s>
<s>
Because	O
of	O
the	O
near	O
view	O
modeling	O
,	O
often	O
at	O
speed	O
,	O
train	B-Language
simulator	I-Language
software	O
is	O
generally	O
far	O
more	O
complicated	O
and	O
difficult	O
software	O
to	O
write	O
and	O
implement	O
than	O
flight	B-Application
simulator	I-Application
programs	O
.	O
</s>
<s>
Like	O
flight	B-Application
simulators	I-Application
,	O
train	B-Language
simulators	I-Language
have	O
been	O
produced	O
for	O
railway	O
training	O
purposes	O
.	O
</s>
<s>
Similarly	O
to	O
flight	B-Application
simulators	I-Application
,	O
train	B-Language
simulators	I-Language
can	O
be	O
a	O
replica	O
of	O
a	O
full	O
driving	O
cabin	O
,	O
on	O
a	O
one-to-one	O
scale	O
.	O
</s>
<s>
Many	O
consumer	O
train	B-General_Concept
simulations	I-General_Concept
have	O
been	O
produced	O
,	O
often	O
focusing	O
on	O
different	O
aspects	O
of	O
real-life	O
railways	O
.	O
</s>
<s>
BVE	B-Application
Trainsim	I-Application
(	O
originally	O
Boso	B-Application
View	I-Application
Express	I-Application
)	O
is	O
a	O
Japanese	O
three-dimensional	O
computer-based	O
train	B-Language
simulator	I-Language
.	O
</s>
<s>
Densha	O
de	O
Go	O
!,	O
a	O
Japanese	O
train	B-General_Concept
simulation	I-General_Concept
game	O
series	O
focused	O
on	O
driving	O
,	O
developed	O
by	O
Taito	O
.	O
</s>
<s>
Diesel	O
Railcar	O
Simulator	O
,	O
a	O
train	B-Language
simulator	I-Language
focusing	O
on	O
British	O
diesel-mechanical	O
railcars	O
.	O
</s>
<s>
Microsoft	B-Application
Train	I-Application
Simulator	I-Application
(	O
MSTS	O
)	O
,	O
developed	O
by	O
Kuju	O
Entertainment	O
.	O
</s>
<s>
Open	O
Rails	O
,	O
an	O
open	B-License
source	I-License
,	O
freeware	O
simulator	O
that	O
is	O
backwards	O
compatible	O
with	O
Microsoft	B-Application
Train	I-Application
Simulator	I-Application
content	O
.	O
</s>
<s>
Rail	B-General_Concept
Simulator	I-General_Concept
,	O
a	O
spiritual	O
successor	O
to	O
MSTS	O
also	O
developed	O
by	O
Kuju	O
Entertainment	O
.	O
</s>
<s>
Train	B-Language
Simulator	I-Language
(	O
originally	O
RailWorks	B-Language
)	O
,	O
a	O
successor	O
to	O
Rail	B-General_Concept
Simulator	I-General_Concept
created	O
when	O
a	O
new	O
company	O
,	O
Rail	B-General_Concept
Simulator	I-General_Concept
Developments	O
Ltd	O
,	O
purchased	O
the	O
rights	O
.	O
</s>
<s>
In	O
2013	O
RSDL	O
rebranded	O
themselves	O
as	O
Dovetail	O
Games	O
,	O
and	O
renamed	O
Railworks	B-Language
to	O
simply	O
Train	B-Language
Simulator	I-Language
.	O
</s>
<s>
Train	B-Device
Sim	I-Device
World	I-Device
,	O
a	O
successor	O
to	O
the	O
above	O
developed	O
by	O
Dovetail	O
Games	O
using	O
the	O
Unreal	B-Operating_System
Engine	I-Operating_System
.	O
</s>
<s>
Run8	O
,	O
a	O
primarily	O
multiplayer	O
train	B-Language
simulator	I-Language
focused	O
on	O
realistic	O
North	O
American	O
freight	O
operations	O
.	O
</s>
<s>
Train	B-Language
Simulator	I-Language
series	O
(	O
a.k.a.	O
</s>
<s>
MaSzyna	O
,	O
a	O
freeware	O
train	B-Language
simulator	I-Language
mainly	O
focusing	O
on	O
Polish	O
mainline	O
rolling	O
stock	O
.	O
</s>
<s>
The	O
PC	O
game	O
3D	B-Application
Ultra	I-Application
Lionel	I-Application
Traintown	I-Application
,	O
amongst	O
some	O
others	O
,	O
give	O
a	O
different	O
experience	O
to	O
driving	O
,	O
by	O
being	O
in	O
a	O
3rd	B-Architecture
person	I-Architecture
omniscient	I-Architecture
perspective	O
,	O
controlling	O
the	O
trains	O
from	O
a	O
bird	O
's	O
eye	O
view	O
.	O
</s>
<s>
Peripherals	O
specifically	O
designed	O
for	O
use	O
with	O
driving	O
simulations	O
include	O
RailDriver	B-Device
by	O
US	O
manufacturer	O
P.I.	O
</s>
<s>
RailDriver	B-Device
is	O
a	O
programmable	O
desktop	O
cab	O
controller	O
with	O
throttle	O
,	O
brake	O
lever	O
and	O
switches	O
designed	O
to	O
work	O
with	O
Trainz	O
,	O
TrainMaster	O
,	O
Microsoft	B-Application
Train	I-Application
Simulator	I-Application
and	O
Rail	B-General_Concept
Simulator	I-General_Concept
.	O
</s>
<s>
The	O
A-Train	B-Application
series	O
(	O
1985	O
to	O
present	O
)	O
is	O
an	O
early	O
example	O
.	O
</s>
<s>
Chris	O
Sawyer	O
's	O
Transport	B-Application
Tycoon	I-Application
(	O
1994	O
)	O
was	O
an	O
influential	O
game	O
in	O
this	O
genre	O
,	O
spawning	O
remakes	O
such	O
as	O
Simutrans	B-Application
(	O
1999	O
to	O
present	O
)	O
,	O
OpenTTD	B-Application
(	O
2004	O
to	O
present	O
)	O
and	O
Sawyer	O
's	O
own	O
Locomotion	B-Application
(	O
2004	O
)	O
.	O
</s>
<s>
Sid	O
Meier	O
designed	O
two	O
railroad	B-General_Concept
simulations	I-General_Concept
:	O
Railroad	B-Application
Tycoon	I-Application
(	O
1990	O
)	O
and	O
Railroads	B-Application
!	I-Application
</s>
<s>
The	O
Railroad	B-Application
Tycoon	I-Application
series	O
itself	O
inspired	O
other	O
rail	O
games	O
such	O
as	O
Rails	B-Application
Across	I-Application
America	I-Application
(	O
2001	O
)	O
.	O
</s>
<s>
Examples	O
include	O
The	B-Application
Train	I-Application
Game	I-Application
(	O
1983	O
)	O
,	O
SimSig	B-Application
,	O
JBSS	O
BAHN	O
,	O
Train	O
Dispatcher	O
,	O
and	O
the	O
series	O
of	O
signalling	O
simulations	O
produced	O
by	O
PC-Rail	O
Software	O
.	O
</s>
<s>
Train	B-Language
simulators	I-Language
are	O
particularly	O
popular	O
in	O
Japan	O
,	O
where	O
rail	O
transport	O
is	O
the	O
primary	O
form	O
of	O
travel	O
for	O
most	O
citizens	O
.	O
</s>
<s>
Train	O
video	O
games	O
have	O
been	O
developed	O
in	O
Japan	O
since	O
the	O
early	O
1980s	O
,	O
with	O
Sega	O
's	O
arcade	O
action	B-Application
game	I-Application
Super	B-Application
Locomotive	I-Application
(	O
1982	O
)	O
being	O
an	O
early	O
example	O
,	O
before	O
more	O
realistic	O
train	B-Language
simulators	I-Language
emerged	O
,	O
such	O
as	O
Ongakukan	O
's	O
Train	B-Language
Simulator	I-Language
series	O
(	O
1995	O
debut	O
)	O
and	O
Taito	O
's	O
Densha	B-Application
de	I-Application
Go	I-Application
series	O
(	O
1996	O
debut	O
)	O
,	O
as	O
well	O
as	O
train	O
business	O
simulations	O
such	O
as	O
the	O
A-Train	B-Application
series	O
(	O
1985	O
debut	O
)	O
.	O
</s>
<s>
Non-commercial	O
Japanese	O
sims	O
include	O
the	O
freeware	O
BVE	B-Application
,	O
first	O
released	O
in	O
1996	O
,	O
which	O
was	O
later	O
remade	O
as	O
the	O
free	B-License
and	I-License
open-source	I-License
OpenBVE	O
.	O
</s>
<s>
One	O
of	O
the	O
first	O
commercially	O
available	O
train	B-Language
simulators	I-Language
in	O
the	O
West	O
was	O
Southern	B-Application
Belle	I-Application
,	O
released	O
in	O
1985	O
.	O
</s>
<s>
The	O
game	O
simulated	O
a	O
journey	O
of	O
the	O
Southern	B-Application
Belle	I-Application
steam	O
passenger	O
train	O
from	O
London	O
Victoria	O
to	O
Brighton	O
,	O
while	O
at	O
the	O
same	O
time	O
the	O
player	O
must	O
comply	O
with	O
speed	O
limits	O
,	O
not	O
to	O
go	O
too	O
fast	O
on	O
curves	O
and	O
keep	O
to	O
the	O
schedule	O
.	O
</s>
<s>
It	O
was	O
followed	O
with	O
Evening	B-Application
Star	I-Application
in	O
1987	O
.	O
</s>
<s>
The	O
first	O
two	O
train	B-Language
simulators	I-Language
to	O
achieve	O
large	O
sales	O
in	O
the	O
West	O
,	O
Microsoft	B-Application
Train	I-Application
Simulator	I-Application
and	O
Trainz	O
,	O
arrived	O
within	O
a	O
few	O
months	O
of	O
one	O
another	O
in	O
2001	O
.	O
</s>
<s>
These	O
featured	O
differing	O
design	O
philosophies	O
-	O
Microsoft	B-Application
Train	I-Application
Simulator	I-Application
focused	O
on	O
providing	O
a	O
realistic	O
driving	O
experience	O
,	O
whereas	O
Trainz	O
focused	O
more	O
on	O
the	O
ability	O
of	O
the	O
user	O
to	O
create	O
their	O
own	O
content	O
such	O
as	O
trains	O
and	O
routes	O
.	O
</s>
<s>
The	O
developers	O
behind	O
Microsoft	B-Application
Train	I-Application
Simulator	I-Application
,	O
Kuju	O
Entertainment	O
,	O
later	O
released	O
a	O
spiritual	O
successor	O
called	O
Rail	B-General_Concept
Simulator	I-General_Concept
,	O
which	O
was	O
later	O
purchased	O
by	O
a	O
separate	O
company	O
and	O
rereleased	O
as	O
Railworks	B-Language
.	O
</s>
