<s>
is	O
a	O
video	O
game	O
for	O
the	O
PlayStation	B-Device
,	O
developed	O
by	O
Artdink	O
.	O
</s>
<s>
The	O
robots	O
,	O
called	O
Overkill	O
Engines	O
(	O
OKEs	O
)	O
,	O
cannot	O
be	O
directly	O
controlled	O
in	O
battle	O
;	O
they	O
must	O
be	O
programmed	O
beforehand	O
to	O
behave	O
in	O
a	O
certain	O
way	O
under	O
certain	O
conditions	O
using	O
a	O
flow	B-Application
diagram	I-Application
system	O
.	O
</s>
<s>
To	O
aid	O
the	O
player	O
in	O
learning	O
the	O
gameplay	O
,	O
Carnage	B-Device
Heart	I-Device
was	O
packaged	O
with	O
an	O
unusually	O
large	O
amount	O
of	O
materials	O
for	O
a	O
console	O
game	O
of	O
the	O
time	O
:	O
in	O
addition	O
to	O
the	O
game	O
disc	O
and	O
above-average	O
length	O
manual	O
,	O
the	O
jewel	O
case	O
contained	O
a	O
58-page	O
strategy	O
guide	O
and	O
a	O
tutorial	O
disc	O
with	O
a	O
30-minute	O
,	O
fully	O
voice-guided	O
overview	O
of	O
most	O
aspects	O
of	O
the	O
game	O
.	O
</s>
<s>
The	O
game	O
received	O
average	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
GameRankings	O
.	O
</s>
<s>
However	O
,	O
most	O
concluded	O
that	O
the	O
gameplay	O
offers	O
more	O
than	O
sufficient	O
payoff	O
to	O
the	O
time	O
required	O
to	O
learn	O
the	O
complex	O
mechanics	O
,	O
and	O
praised	O
the	O
game	O
as	O
bringing	O
more	O
variety	O
to	O
the	O
PlayStation	B-Device
library	O
,	O
which	O
had	O
been	O
short	O
on	O
such	O
cerebral	O
games	O
up	O
to	O
this	O
time	O
.	O
</s>
<s>
GameSpot	O
assessed	O
it	O
more	O
moderately	O
,	O
but	O
still	O
positively	O
:	O
"	O
For	O
those	O
who	O
do	O
n't	O
mind	O
building	O
a	O
mech	O
from	O
the	O
ground	O
up	O
,	O
determining	O
its	O
every	O
action	O
,	O
then	O
relinquishing	O
control	O
of	O
it	O
when	O
it	O
gets	O
on	O
the	O
battlefield	O
,	O
Carnage	B-Device
Heart	I-Device
will	O
surely	O
provide	O
long	O
hours	O
of	O
highly-detailed	O
futuristic	O
military	O
strategy.	O
"	O
</s>
<s>
However	O
,	O
they	O
added	O
"	O
Do	O
n't	O
get	O
us	O
wrong	O
;	O
Carnage	B-Device
Heart	I-Device
can	O
be	O
rewarding	O
once	O
you	O
learn	O
how	O
to	O
play	O
it.	O
"	O
</s>
<s>
Carnage	B-Device
Heart	I-Device
has	O
had	O
four	O
sequels	O
to	O
date	O
,	O
all	O
of	O
which	O
,	O
aside	O
from	O
EXA	O
,	O
have	O
only	O
been	O
released	O
in	O
Japan	O
:	O
</s>
<s>
Carnage	B-Device
Heart	I-Device
EZ	O
(	O
"	O
easy	O
zapping	O
"	O
)	O
-	O
an	O
improved	O
version	O
of	O
the	O
original	O
Carnage	B-Device
Heart	I-Device
with	O
additional	O
programming	O
options	O
(	O
macros	O
)	O
and	O
tougher	O
AI	O
opponents	O
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	O
Japanese	O
PlayStation	B-Device
Network	I-Device
on	O
March	O
24	O
,	O
2009	O
.	O
</s>
<s>
Zeus	O
Carnage	B-Device
Heart	I-Device
Second	O
-	O
a	O
sequel	O
with	O
a	O
new	O
storyline	O
,	O
programming	O
was	O
similar	O
but	O
otherwise	O
significantly	O
different	O
from	O
the	O
original	O
Carnage	B-Device
Heart	I-Device
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	O
Japanese	O
PlayStation	B-Device
Network	I-Device
on	O
May	O
13	O
,	O
2009	O
.	O
</s>
<s>
Zeus	O
II	O
Carnage	B-Device
Heart	I-Device
-	O
another	O
sequel	O
(	O
not	O
to	O
be	O
confused	O
with	O
"	O
Zeus	O
Carnage	B-Device
Heart	I-Device
Second	O
"	O
)	O
with	O
a	O
new	O
storyline	O
,	O
and	O
vastly	O
improved	O
graphics	O
over	O
the	O
original	O
Carnage	B-Device
Heart	I-Device
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	O
Japanese	O
PlayStation	B-Device
Network	I-Device
on	O
June	O
10	O
,	O
2009	O
.	O
</s>
<s>
Carnage	B-Device
Heart	I-Device
Portable	O
(	O
PSP	B-Operating_System
)	O
-	O
offers	O
improved	O
graphics	O
,	O
updated	O
chips	O
and	O
interface	O
,	O
as	O
well	O
as	O
new	O
OKE	O
types	O
.	O
</s>
