<s>
Jack	B-Application
the	I-Application
Ripper	I-Application
is	O
a	O
text	O
adventure	O
computer	O
game	O
designed	O
by	O
St.	O
Bride	O
's	O
School	O
and	O
released	O
by	O
CRL	O
in	O
1987	B-Application
for	O
the	O
Commodore	O
64	O
,	O
Amstrad	B-Device
CPC	I-Device
and	O
ZX	B-Operating_System
Spectrum	I-Operating_System
home	O
computers	O
.	O
</s>
<s>
The	O
game	O
is	O
based	O
on	O
the	O
notorious	O
"	O
Jack	B-Application
the	I-Application
Ripper	I-Application
"	O
murders	O
in	O
1880s	O
London	O
.	O
</s>
<s>
As	O
with	O
the	O
earlier	O
CRL	O
adventures	O
Dracula	B-Application
and	O
Frankenstein	B-Application
,	O
the	O
game	O
was	O
classified	O
by	O
the	O
British	O
Board	O
of	O
Film	O
Classification	O
,	O
receiving	O
an	O
'	O
18	O
 '	O
certificate	O
for	O
its	O
gory	O
graphics	O
.	O
</s>
<s>
They	O
considered	O
Jack	B-Application
the	I-Application
Ripper	I-Application
to	O
be	O
the	O
superior	O
game	O
,	O
as	O
it	O
lacked	O
bugs	O
.	O
</s>
