<s>
Tombstone	B-Application
City	I-Application
:	I-Application
21st	I-Application
Century	I-Application
is	O
a	O
single-player	O
multidirectional	O
shooter	O
written	O
by	O
John	O
C	O
.	O
Plaster	O
for	O
TI-99/4A	B-Device
home	O
computer	O
and	O
published	O
by	O
Texas	O
Instruments	O
in	O
1981	O
.	O
</s>
<s>
Morgs	O
are	O
produced	O
via	O
one	O
of	O
the	O
cacti	B-Language
out	O
in	O
the	O
field	O
.	O
</s>
<s>
They	O
can	O
only	O
appear	O
from	O
a	O
cactus	B-Language
that	O
touches	O
another	O
cactus	B-Language
.	O
</s>
<s>
Whenever	O
a	O
Morg	O
is	O
shot	O
,	O
it	O
turns	O
into	O
another	O
cactus	B-Language
.	O
</s>
<s>
If	O
a	O
Morg	O
is	O
shot	O
next	O
to	O
two	O
adjacent	O
cacti	B-Language
,	O
the	O
cacti	B-Language
and	O
Morg	O
disappear	O
and	O
a	O
new	O
Morg	O
is	O
immediately	O
spawned	O
.	O
</s>
<s>
The	O
goal	O
is	O
to	O
leave	O
only	O
cacti	B-Language
standing	O
individually	O
,	O
so	O
that	O
no	O
more	O
Morgs	O
can	O
appear	O
.	O
</s>
<s>
When	O
all	O
cacti	B-Language
stand	O
alone	O
,	O
one	O
game	O
day	O
ends	O
,	O
the	O
player	O
is	O
awarded	O
a	O
bonus	O
schooner	O
,	O
and	O
a	O
new	O
day	O
begins	O
with	O
cacti	B-Language
repositioned	O
.	O
</s>
<s>
If	O
a	O
Morg	O
is	O
killed	O
adjacent	O
to	O
one	O
of	O
the	O
exits	O
,	O
the	O
cactus	B-Language
placed	O
there	O
blocks	O
off	O
the	O
exit	O
for	O
the	O
remainder	O
of	O
the	O
game	O
day	O
.	O
</s>
<s>
In	O
2019	O
,	O
Collectorvision	O
released	O
a	O
clone	O
for	O
the	O
ColecoVision	B-Device
called	O
Saguaro	O
City	O
.	O
</s>
