<s>
Hearts	B-Application
of	I-Application
Iron	I-Application
is	O
a	O
grand	O
strategy	O
video	O
game	O
developed	O
by	O
Paradox	O
Development	O
Studio	O
and	O
published	O
by	O
Strategy	O
First	O
.	O
</s>
<s>
Based	O
on	O
the	O
Europa	B-Application
Engine	I-Application
,	O
it	O
was	O
originally	O
released	O
in	O
2002	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
A	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
version	O
was	O
released	O
by	O
Virtual	O
Programming	O
the	O
following	O
year	O
.	O
</s>
<s>
In	O
2004	O
,	O
Atari	O
,	O
SA	O
published	O
Hearts	B-Application
of	I-Application
Iron	I-Application
:	O
Platinum	O
,	O
an	O
updated	O
version	O
that	O
sought	O
to	O
improve	O
several	O
aspects	O
of	O
the	O
game	O
.	O
</s>
<s>
Hearts	B-Application
of	I-Application
Iron	I-Application
allows	O
the	O
player	O
to	O
take	O
control	O
of	O
a	O
nation	O
in	O
the	O
world	O
and	O
guide	O
it	O
through	O
World	O
War	O
II	O
and	O
the	O
years	O
immediately	O
before	O
and	O
after	O
it	O
.	O
</s>
<s>
Hearts	B-Application
of	I-Application
Iron	I-Application
is	O
the	O
first	O
game	O
in	O
the	O
eponymous	O
series	O
of	O
grand	O
strategy	O
wargames	O
.	O
</s>
<s>
Three	O
additional	O
games	O
have	O
been	O
released	O
in	O
the	O
series	O
:	O
Hearts	B-Application
of	I-Application
Iron	I-Application
II	I-Application
,	O
Hearts	B-Application
of	I-Application
Iron	I-Application
III	I-Application
,	O
and	O
Hearts	B-Application
of	I-Application
Iron	I-Application
IV	I-Application
.	O
</s>
<s>
A	O
sequel	O
to	O
Hearts	B-Application
of	I-Application
Iron	I-Application
,	O
Hearts	B-Application
of	I-Application
Iron	I-Application
II	I-Application
,	O
was	O
released	O
in	O
2005	O
.	O
</s>
<s>
Two	O
spin-offs	O
were	O
created	O
for	O
Hearts	B-Application
of	I-Application
Iron	I-Application
II	I-Application
:	O
Darkest	B-Application
Hour	I-Application
:	I-Application
A	I-Application
Hearts	I-Application
of	I-Application
Iron	I-Application
Game	I-Application
and	O
Arsenal	B-Application
of	I-Application
Democracy	I-Application
:	I-Application
A	I-Application
Hearts	I-Application
of	I-Application
Iron	I-Application
Game	I-Application
.	O
</s>
<s>
The	O
third	O
game	O
in	O
the	O
series	O
,	O
Hearts	B-Application
of	I-Application
Iron	I-Application
III	I-Application
was	O
released	O
on	O
August	O
7	O
,	O
2009	O
.	O
</s>
<s>
Hearts	B-Application
of	I-Application
Iron	I-Application
–	O
The	O
Card	O
Game	O
was	O
released	O
as	O
a	O
free-to-play	O
,	O
browser-based	B-Protocol
collectible	O
card	O
game	O
on	O
October	O
3	O
,	O
2011	O
.	O
</s>
<s>
East	B-Application
vs.	I-Application
West	I-Application
–	I-Application
A	I-Application
Hearts	I-Application
of	I-Application
Iron	I-Application
Game	I-Application
was	O
scheduled	O
to	O
release	O
in	O
2014	O
,	O
but	O
was	O
canceled	O
.	O
</s>
<s>
Hearts	B-Application
of	I-Application
Iron	I-Application
IV	I-Application
,	O
the	O
fourth	O
main	O
installment	O
in	O
the	O
series	O
,	O
was	O
released	O
on	O
June	O
6	O
,	O
2016	O
.	O
</s>
<s>
The	O
game	O
received	O
"	O
average	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
Tom	O
Chick	O
of	O
Computer	O
Games	O
Magazine	O
summarized	O
Hearts	B-Application
of	I-Application
Iron	I-Application
as	O
"	O
an	O
ambitious	O
mess	O
,	O
a	O
noble	O
mess	O
,	O
certainly	O
a	O
well-intentioned	O
mess	O
,	O
but	O
ultimately	O
a	O
mess	O
nonetheless	O
"	O
.	O
</s>
<s>
Hearts	B-Application
of	I-Application
Iron	I-Application
:	O
Platinum	O
was	O
released	O
in	O
2004	O
with	O
the	O
intention	O
of	O
improving	O
several	O
elements	O
of	O
the	O
original	O
game	O
.	O
</s>
<s>
According	O
to	O
Metacritic	O
,	O
Hearts	B-Application
of	I-Application
Iron	I-Application
:	O
Platinum	O
received	O
slightly	O
more	O
favorable	O
reviews	O
than	O
the	O
original	O
Hearts	B-Application
of	I-Application
Iron	I-Application
.	O
</s>
