<s>
II	O
:	O
Grog	B-Application
's	I-Application
Revenge	I-Application
is	O
a	O
1984	B-Application
video	O
game	O
by	O
Sydney	O
Development	O
for	O
the	O
Commodore	O
64	O
,	O
ColecoVision	B-Device
,	O
Coleco	B-Device
ADAM	I-Device
,	O
and	O
MSX	B-Operating_System
.	O
</s>
<s>
'	O
s	O
Quest	B-Application
For	I-Application
Tires	I-Application
and	O
is	O
based	O
on	O
B.C.	O
,	O
the	O
newspaper	O
comic	O
strip	O
by	O
Johnny	O
Hart	O
.	O
</s>
<s>
The	O
game	O
was	O
advertised	O
for	O
the	O
Atari	B-Device
8-bit	I-Device
,	O
ZX	B-Operating_System
Spectrum	I-Operating_System
,	O
BBC	B-Device
Micro	I-Device
,	O
and	O
Amstrad	B-Device
CPC	I-Device
,	O
but	O
those	O
ports	O
were	O
never	O
released	O
.	O
</s>
<s>
Thor	O
,	O
a	O
caveman	B-Algorithm
,	O
who	O
rides	O
a	O
stone	O
unicycle	O
,	O
is	O
searching	O
for	O
the	O
"	O
meaning	O
of	O
life	O
"	O
within	O
several	O
mountains	O
.	O
</s>
<s>
The	O
player	O
must	O
navigate	O
Thor	O
through	O
the	O
mountains	O
,	O
collecting	O
clams	B-Application
.	O
</s>
<s>
Like	O
the	O
comic	O
strip	O
,	O
clams	B-Application
are	O
used	O
as	O
money	O
.	O
</s>
<s>
The	O
object	O
of	O
the	O
game	O
is	O
to	O
collect	O
enough	O
clams	B-Application
to	O
pay	O
a	O
toll	O
to	O
another	O
caveman	B-Algorithm
,	O
Peter	O
,	O
which	O
will	O
allow	O
Thor	O
to	O
access	O
the	O
next	O
mountain	O
.	O
</s>
<s>
If	O
the	O
player	O
collects	O
enough	O
clams	B-Application
before	O
arriving	O
at	O
the	O
end	O
of	O
the	O
mountain	O
trail	O
,	O
he	O
proceeds	O
to	O
the	O
next	O
mountain	O
;	O
otherwise	O
,	O
he	O
must	O
return	O
to	O
collect	O
more	O
clams	B-Application
.	O
</s>
<s>
The	O
Commodore	O
64	O
and	O
Coleco	B-Device
ADAM	I-Device
versions	O
has	O
15	O
stages	O
(	O
5	O
per	O
set	O
)	O
.	O
</s>
<s>
The	O
MSX	B-Operating_System
and	O
ColecoVision	B-Device
versions	O
only	O
has	O
5	O
stages	O
.	O
</s>
<s>
Due	O
to	O
a	O
programming	O
error	O
,	O
none	O
of	O
the	O
MSX	B-Operating_System
releases	O
can	O
be	O
completed	O
.	O
</s>
<s>
The	O
same	O
goes	O
for	O
the	O
ColecoVision	B-Device
version	O
,	O
although	O
the	O
bug	O
was	O
fixed	O
for	O
the	O
Coleco	O
Canada	O
release	O
.	O
</s>
<s>
Computer	O
and	O
Video	O
Games	O
rated	O
the	O
ColecoVision	B-Device
version	O
87%	O
in	O
1989	O
.	O
</s>
<s>
In	O
a	O
retrospective	O
feature	O
from	O
1994	O
on	O
old	O
video	O
games	O
,	O
Commodore	O
Format	O
said	O
Grog	B-Application
's	I-Application
Revenge	I-Application
was	O
"	O
definitely	O
a	O
game	O
of	O
the	O
old	O
school	O
"	O
but	O
remained	O
"	O
a	O
fun	O
little	O
diversion.	O
"	O
</s>
