<s>
Emerald	B-Application
Mine	I-Application
is	O
a	O
1987	O
puzzle	O
video	O
game	O
developed	O
and	O
published	O
for	O
Amiga	B-Device
and	O
Atari	B-Device
ST	I-Device
by	O
Kingsoft	O
.	O
</s>
<s>
Emerald	B-Application
Mine	I-Application
was	O
Kingsoft	O
's	O
best-selling	O
title	O
with	O
reviews	O
generally	O
favorable	O
,	O
and	O
spawned	O
several	O
sequels	O
.	O
</s>
<s>
It	O
was	O
also	O
Volker	O
Wertich	O
's	O
,	O
one	O
of	O
the	O
game	O
's	O
designers	O
,	O
most	O
successful	O
game	O
until	O
The	B-Application
Settlers	I-Application
in	O
1993	O
,	O
of	O
which	O
he	O
was	O
also	O
the	O
creator	O
.	O
</s>
<s>
Emerald	B-Application
Mine	I-Application
is	O
a	O
top-down	O
,	O
tile-based	B-Application
puzzle	O
game	O
.	O
</s>
<s>
Similar	O
to	O
Boulder	O
Dash	O
,	O
it	O
revolves	O
around	O
a	O
character	O
who	O
attempts	O
to	O
collect	O
enough	O
emeralds	O
and	O
diamonds	O
scattered	O
across	O
maze-like	O
structures	O
before	O
reaching	O
the	O
exit	O
,	O
all	O
within	O
a	O
time	O
limit	O
.	O
</s>
<s>
Some	O
of	O
these	O
mazes	B-Application
contain	O
enemies	O
,	O
including	O
those	O
that	O
travel	O
along	O
a	O
wall	O
on	O
a	O
certain	O
side	O
and	O
one	O
kind	O
that	O
eats	O
diamonds	O
in	O
its	O
way	O
.	O
</s>
<s>
Emerald	B-Application
Mine	I-Application
allows	O
for	O
two	O
players	O
to	O
cooperate	O
and	O
complete	O
their	O
objectives	O
,	O
with	O
some	O
levels	O
designed	O
exclusively	O
for	O
that	O
mode	O
.	O
</s>
<s>
Emerald	B-Application
Mine	I-Application
was	O
developed	O
by	O
Kingsoft	O
,	O
based	O
in	O
Aachen	O
.	O
</s>
<s>
Wertich	O
would	O
later	O
go	O
on	O
to	O
become	O
the	O
creator	O
of	O
a	O
more	O
successful	O
game	O
,	O
the	O
debut	O
installment	O
of	O
The	B-Application
Settlers	I-Application
,	O
in	O
1993	O
.	O
</s>
<s>
This	O
game	O
was	O
released	O
for	O
Amiga	B-Device
and	O
Atari	B-Device
ST	I-Device
in	O
1987	O
and	O
ported	O
to	O
the	O
Commodore	O
64	O
and	O
the	O
Commodore	B-Operating_System
16	I-Operating_System
and	O
Plus/4	B-Operating_System
computers	O
the	O
next	O
year	O
.	O
</s>
<s>
Emerald	B-Application
Mine	I-Application
received	O
generally	O
favorable	O
reviews	O
,	O
was	O
Kingsoft	O
's	O
best-selling	O
title	O
,	O
and	O
was	O
also	O
Wertich	O
's	O
most	O
successful	O
game	O
until	O
The	B-Application
Settlers	I-Application
.	O
</s>
<s>
Aktueller	O
Software	O
Markt	O
cited	O
the	O
game	O
's	O
high	O
difficulty	O
;	O
saying	O
"	O
If	O
you	O
liked	O
well-programmed	O
,	O
tricky	O
games	O
,	O
then	O
Emerald	B-Application
Mine	I-Application
would	O
be	O
exactly	O
the	O
right	O
thing	O
for	O
you	O
.	O
</s>
<s>
While	O
directing	O
minor	O
criticism	O
towards	O
its	O
graphics	O
,	O
Commodore	O
Computing	O
International	O
considered	O
Emerald	B-Application
Mine	I-Application
a	O
good	O
and	O
inexpensive	O
addition	O
to	O
the	O
Amiga	B-Device
games	O
library	O
that	O
had	O
yet	O
to	O
expand	O
to	O
over	O
a	O
hundred	O
full-price	O
titles	O
.	O
</s>
<s>
Amiga	B-Device
World	O
remarked	O
on	O
the	O
game	O
's	O
addictive	O
nature	O
,	O
comparing	O
it	O
to	O
arcade	O
classics	O
,	O
and	O
noted	O
its	O
ability	O
to	O
save	O
up	O
to	O
eight	O
player	O
names	O
,	O
their	O
score	O
totals	O
,	O
and	O
how	O
many	O
levels	O
they	O
mastered	O
—	O
a	O
feature	O
unusual	O
at	O
the	O
time	O
.	O
</s>
<s>
In	O
its	O
retrospective	O
review	O
,	O
Amiga	B-Device
Joker	O
commented	O
on	O
the	O
game	O
's	O
appeal	O
,	O
saying	O
"	O
It	O
's	O
the	O
playing	O
fun	O
that	O
counts	O
"	O
,	O
and	O
that	O
the	O
design	O
was	O
well	O
received	O
:	O
"	O
Nobody	O
offers	O
such	O
a	O
good	O
control	O
and	O
inventively	O
designed	O
levels	O
"	O
.	O
</s>
<s>
Happy	O
Computer	O
considered	O
it	O
to	O
be	O
the	O
best	O
budget	O
game	O
of	O
the	O
year	O
,	O
and	O
Amiga	B-Device
World	O
awarded	O
the	O
game	O
the	O
title	O
of	O
the	O
Number	O
One	O
Amiga	B-Device
Game	O
of	O
All	O
Time	O
in	O
1988	O
.	O
</s>
<s>
Kingsoft	O
developed	O
and	O
published	O
Emerald	B-Application
Mine	I-Application
2	O
,	O
the	O
game	O
's	O
sequel	O
,	O
in	O
1988	O
with	O
100	O
new	O
levels	O
.	O
</s>
<s>
In	O
1990	O
,	O
Kingsoft	O
published	O
a	O
selection	O
of	O
levels	O
created	O
by	O
players	O
,	O
called	O
Emerald	B-Application
Mine	I-Application
3	O
:	O
Professional	O
.	O
</s>
<s>
Amiga	B-Device
Joker	O
was	O
also	O
highly	O
critical	O
of	O
the	O
game	O
's	O
presentation	O
commenting	O
;	O
"	O
There	O
's	O
no	O
change	O
on	O
graphics	O
and	O
sound	O
[…],	O
all	O
technical	O
details	O
like	O
animation	O
and	O
scrolling	O
appear	O
substantially	O
dated.	O
"	O
</s>
<s>
In	O
1994	O
,	O
Almathera	O
published	O
a	O
collection	O
of	O
14,160	O
levels	O
on	O
over	O
80	O
compact	O
disks	O
,	O
titled	O
Emerald	B-Application
Mines	I-Application
.	O
</s>
<s>
It	O
received	O
a	O
better	O
critical	O
reception	O
than	O
that	O
of	O
EM3	O
,	O
with	O
Amiga	B-Device
Games	O
commenting	O
that	O
the	O
gameplay	O
was	O
as	O
good	O
as	O
ever	O
,	O
"	O
This	O
Boulder	O
Dash	O
clone	O
does	O
n't	O
come	O
up	O
with	O
spectacular	O
graphics	O
,	O
but	O
the	O
addicting	O
game	O
principle	O
and	O
over	O
10,000	O
levels	O
should	O
guarantee	O
playing	O
fun	O
for	O
months.	O
"	O
</s>
<s>
Amiga	B-Device
Joker	O
also	O
commented	O
on	O
the	O
gameplay	O
;	O
"	O
The	O
game	O
elements	O
are	O
in	O
such	O
an	O
abundance	O
and	O
variants	O
that	O
variety	O
is	O
presented	O
truly	O
in	O
the	O
whole	O
lot	O
.	O
</s>
<s>
Emerald	B-Application
Mines	I-Application
levels	O
and	O
assets	O
formed	O
part	O
of	O
the	O
basis	O
for	O
Rocks'n'Diamonds	B-Language
,	O
another	O
clone	O
of	O
Boulder	O
Dash	O
and	O
a	O
free	B-License
and	I-License
open-source	I-License
game	I-License
,	O
along	O
with	O
Supaplex	B-Application
.	O
</s>
