<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
,	O
known	O
in	O
Japan	O
as	O
,	O
is	O
a	O
series	O
of	O
third-person	O
shooter	O
video	O
games	O
.	O
</s>
<s>
The	O
Earth	B-Application
Defense	I-Application
Force	I-Application
,	O
a	O
unified	O
multinational	O
military	O
,	O
is	O
founded	O
a	O
few	O
years	O
later	O
,	O
in	O
case	O
the	O
aliens	O
prove	O
to	O
be	O
hostile	O
.	O
</s>
<s>
31	O
:	O
The	O
地球防衛軍	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
Chikyū	O
Bōeigun	O
or	O
Earth	B-Application
Defense	I-Application
Force	I-Application
was	O
created	O
by	O
Sandlot	O
as	O
part	O
of	O
D3	O
Publisher	O
's	O
Simple	O
series	O
of	O
budget-priced	O
games	O
on	O
a	O
compact	O
disk	O
.	O
</s>
<s>
Chikyū	B-Application
Bōeigun	I-Application
2	I-Application
is	O
the	O
second	O
game	O
in	O
the	O
series	O
,	O
released	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
The	O
game	O
was	O
released	O
in	O
Europe	O
as	O
Global	B-Application
Defence	I-Application
Force	I-Application
but	O
was	O
not	O
released	O
in	O
North	O
America	O
.	O
</s>
<s>
A	O
PlayStation	B-Operating_System
Portable	I-Operating_System
version	O
of	O
the	O
game	O
,	O
titled	O
Earth	B-Application
Defense	I-Application
Forces	I-Application
2	O
Portable	O
was	O
released	O
on	O
April	O
7	O
,	O
2011	O
,	O
in	O
Japan	O
.	O
</s>
<s>
A	O
remake	O
for	O
the	O
PlayStation	B-Device
Vita	I-Device
,	O
entitled	O
Earth	B-Application
Defense	I-Application
Force	I-Application
2	I-Application
:	I-Application
Invaders	I-Application
from	I-Application
Planet	I-Application
Space	I-Application
(	O
or	O
Earth	B-Application
Defense	I-Application
Forces	I-Application
2	O
Portable	O
V2	O
in	O
Japan	O
)	O
,	O
was	O
released	O
on	O
December	O
11	O
,	O
2014	O
,	O
in	O
Japan	O
,	O
with	O
a	O
North	O
American	O
port	O
released	O
on	O
December	O
8	O
,	O
2015	O
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
2017	I-Application
,	O
known	O
in	O
Japan	O
as	O
Chikyū	B-Application
Bōeigun	I-Application
3	I-Application
is	O
the	O
third	O
game	O
in	O
the	O
series	O
,	O
released	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
A	O
PlayStation	B-Device
Vita	I-Device
version	O
of	O
Earth	B-Application
Defense	I-Application
Force	I-Application
3	I-Application
was	O
announced	O
on	O
June	O
5	O
,	O
2012	O
,	O
as	O
Earth	B-Application
Defense	I-Application
Forces	I-Application
3	O
Portable	O
.	O
</s>
<s>
The	O
new	O
version	O
includes	O
both	O
local	O
and	O
online	O
co-operative	O
play	O
,	O
as	O
well	O
as	O
the	O
return	O
of	O
Palewing	O
from	O
Earth	B-Application
Defense	I-Application
Force	I-Application
2	I-Application
.	O
</s>
<s>
A	O
port	O
of	O
the	O
game	O
is	O
planned	O
to	O
be	O
released	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
in	O
Japan	O
on	O
October	O
14	O
,	O
2021	O
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
2025	I-Application
,	O
known	O
in	O
Japan	O
as	O
Chikyū	B-Application
Bōeigun	I-Application
4	I-Application
,	O
was	O
released	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
and	O
PlayStation	B-Operating_System
3	I-Operating_System
on	O
July	O
4	O
,	O
2013	O
,	O
in	O
Japan	O
.	O
</s>
<s>
Developed	O
by	O
Sandlot	O
,	O
it	O
is	O
a	O
direct	O
sequel	O
to	O
Earth	B-Application
Defense	I-Application
Force	I-Application
2017	I-Application
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
4.1	I-Application
:	I-Application
The	I-Application
Shadow	I-Application
of	I-Application
New	I-Application
Despair	I-Application
,	O
an	O
updated	O
port	O
,	O
was	O
released	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
on	O
April	O
2	O
,	O
2015	O
,	O
in	O
Japan	O
and	O
on	O
December	O
8	O
,	O
2015	O
,	O
in	O
North	O
America	O
.	O
</s>
<s>
A	O
Nintendo	B-Application
Switch	I-Application
version	O
is	O
planned	O
to	O
be	O
release	O
in	O
Japan	O
in	O
2022	O
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
5	I-Application
was	O
announced	O
at	O
TGS	O
2016	O
,	O
and	O
was	O
released	O
on	O
December	O
7	O
,	O
2017	O
,	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
in	O
Japan	O
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
6	O
is	O
a	O
sequel	O
to	O
Earth	B-Application
Defense	I-Application
Force	I-Application
5	I-Application
and	O
was	O
released	O
on	O
August	O
25	O
,	O
2022	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
and	O
PlayStation	B-Device
5	I-Device
in	O
Japan	O
.	O
</s>
<s>
Chikyū	O
Bōeigun	O
:	O
Tactics	O
,	O
known	O
as	O
Global	B-Device
Defence	I-Device
Force	I-Device
Tactics	I-Device
in	O
Europe	O
,	O
is	O
a	O
turn-based	O
strategy	O
game	O
,	O
taking	O
place	O
after	O
the	O
events	O
of	O
Global	B-Application
Defence	I-Application
Force	I-Application
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
:	I-Application
Insect	I-Application
Armageddon	I-Application
is	O
the	O
fourth	O
game	O
in	O
the	O
series	O
,	O
released	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
Windows	O
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
:	I-Application
Iron	I-Application
Rain	I-Application
was	O
announced	O
at	O
TGS	O
2017	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
April	O
11	O
,	O
2019	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
worldwide	O
.	O
</s>
<s>
Earth	B-Application
Defense	I-Application
Force	I-Application
:	O
World	O
Brothers	O
was	O
announced	O
on	O
June	O
23	O
,	O
2020	O
as	O
an	O
action	O
spin-off	O
with	O
voxel	O
graphics	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
,	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
PC	O
.	O
</s>
<s>
Despite	O
generally	O
mixed	O
reviews	O
,	O
the	O
Earth	B-Application
Defense	I-Application
Force	I-Application
series	O
,	O
particularly	O
from	O
Earth	B-Application
Defense	I-Application
Force	I-Application
2017	I-Application
and	O
onwards	O
,	O
has	O
been	O
described	O
as	O
having	O
a	O
cult	O
following	O
.	O
</s>
<s>
Joe	O
Juba	O
of	O
Game	O
Informer	O
defined	O
Earth	B-Application
Defense	I-Application
Force	I-Application
2017	I-Application
as	O
a	O
cult	O
classic	O
,	O
stating	O
that	O
"	O
the	O
developers	O
at	O
Sandlot	O
clearly	O
want	O
to	O
tell	O
a	O
story	O
about	O
humanity	O
's	O
struggle	O
against	O
giant	O
invading	O
ants	O
and	O
robots	O
,	O
and	O
the	O
passion	O
for	O
that	O
story	O
shines	O
through	O
despite	O
its	O
technical	O
shortcomings	O
"	O
;	O
in	O
reviewing	O
Earth	B-Application
Defense	I-Application
Force	I-Application
5	I-Application
five	O
years	O
later	O
,	O
he	O
similarly	O
opined	O
that	O
the	O
series	O
has	O
"	O
always	O
had	O
a	O
single-minded	O
commitment	O
to	O
one	O
simple	O
truth	O
:	O
It	O
's	O
fun	O
to	O
use	O
weird	O
weapons	O
to	O
blast	O
lots	O
of	O
aliens.	O
"	O
</s>
<s>
Though	O
Jim	O
Sterling	O
gave	O
Earth	B-Application
Defense	I-Application
Force	I-Application
2025	I-Application
a	O
negative	O
review	O
,	O
they	O
did	O
acknowledge	O
that	O
the	O
series	O
"	O
has	O
managed	O
to	O
earn	O
itself	O
a	O
fierce	O
cult	O
following	O
through	O
audacity	O
alone	O
"	O
.	O
</s>
