<s>
Trust	B-Operating_System
&	I-Operating_System
Betrayal	I-Operating_System
:	I-Operating_System
The	I-Operating_System
Legacy	I-Operating_System
of	I-Operating_System
Siboot	I-Operating_System
,	O
often	O
abbreviated	O
simply	O
to	O
Siboot	B-Operating_System
,	O
was	O
a	O
game	O
designed	O
and	O
programmed	O
by	O
Chris	O
Crawford	O
for	O
the	O
Macintosh	B-Device
and	O
published	O
by	O
Mindscape	O
in	O
1987	O
.	O
</s>
<s>
Therefore	O
,	O
a	O
player	O
has	O
to	O
know	O
who	O
to	O
trust	O
and	O
who	O
to	O
betray	O
,	O
hence	O
the	O
title	O
:	O
Trust	B-Operating_System
&	I-Operating_System
Betrayal	I-Operating_System
.	O
</s>
<s>
The	O
game	O
uses	O
an	O
inverse	B-Application
parser	I-Application
,	O
a	O
method	O
for	O
constructing	O
sentences	O
out	O
of	O
words	O
while	O
only	O
presenting	O
words	O
that	O
make	O
sense	O
for	O
the	O
given	O
context	O
.	O
</s>
<s>
"	O
Siboot	B-Operating_System
"	O
,	O
the	O
name	O
of	O
the	O
first	O
Shepherd	O
,	O
is	O
a	O
reversal	O
of	O
the	O
syllables	O
of	O
"	O
Bootsie	O
"	O
,	O
a	O
cat	O
which	O
Crawford	O
had	O
.	O
</s>
<s>
One	O
day	O
while	O
pondering	O
this	O
,	O
Crawford	O
had	O
a	O
flash	O
of	O
insight	O
:	O
his	O
next	O
game	O
would	O
be	O
Talk	O
to	O
the	O
Animals	O
,	O
which	O
evolved	O
into	O
the	O
very	O
different	O
Trust	B-Operating_System
&	I-Operating_System
Betrayal	I-Operating_System
.	O
</s>
<s>
A	O
preliminary	O
IBM	B-Device
PC	I-Device
port	O
was	O
made	O
but	O
never	O
finished	O
.	O
</s>
<s>
Siboot	B-Operating_System
was	O
poorly	O
received	O
in	O
the	O
marketplace	O
and	O
did	O
not	O
recoup	O
its	O
investment	O
.	O
</s>
<s>
It	O
sold	O
5,000	O
units	O
on	O
the	O
Macintosh	B-Device
.	O
</s>
<s>
In	O
2013	O
Crawford	O
publicly	O
released	O
the	O
source	O
code	O
of	O
several	O
of	O
his	O
games	O
,	O
including	O
Trust	B-Operating_System
&	I-Operating_System
Betrayal	I-Operating_System
.	O
</s>
