<s>
Chicken	B-Application
Invaders	I-Application
is	O
a	O
series	O
of	O
shoot	O
'	O
em	O
up	O
video	O
games	O
created	O
by	O
Greek	O
indie	O
developer	O
Konstantinos	O
Prouskas	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
the	O
first	O
game	O
Chicken	B-Application
Invaders	I-Application
in	O
1999	O
,	O
the	O
games	O
are	O
one	O
of	O
the	O
longest	O
running	O
series	O
of	O
video	O
games	O
developed	O
in	O
Greece	O
.	O
</s>
<s>
All	O
six	O
main	O
entries	O
in	O
the	O
series	O
have	O
been	O
developed	O
by	O
Prouskas	O
 '	O
InterAction	O
studios	O
,	O
and	O
have	O
been	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
Linux	B-Application
,	O
iOS	B-Application
,	O
Windows	B-Protocol
Phone	I-Protocol
,	O
and	O
Android	B-Application
platforms	I-Application
.	O
</s>
<s>
The	O
games	O
make	O
heavy	O
use	O
of	O
humor	O
,	O
especially	O
in	O
the	O
form	O
of	O
parodies	O
of	O
Galaxian	B-Application
,	O
Star	B-Application
Wars	I-Application
,	O
Space	B-Application
Invaders	I-Application
and	O
Star	B-Operating_System
Trek	I-Operating_System
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
is	O
the	O
first	O
game	O
of	O
the	O
Chicken	B-Application
Invaders	I-Application
franchise	O
,	O
released	O
on	O
24	O
July	O
1999	O
.	O
</s>
<s>
It	O
is	O
a	O
fixed	O
shooter	O
,	O
reminiscent	O
of	O
the	O
original	O
Space	B-Application
Invaders	I-Application
(	O
of	O
which	O
the	O
game	O
is	O
a	O
parody	O
of	O
)	O
,	O
in	O
which	O
the	O
player	O
controls	O
a	O
lone	O
spacecraft	O
by	O
moving	O
it	O
horizontally	O
across	O
the	O
bottom	O
of	O
the	O
screen	O
and	O
firing	O
at	O
swarms	B-Application
of	O
invading	O
extraterrestrial	O
chickens	O
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
features	O
weapon	O
power-ups	O
that	O
resemble	O
gift	O
boxes	O
,	O
used	O
by	O
the	O
player	O
to	O
upgrade	O
their	O
weapons	O
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
is	O
the	O
only	O
game	O
in	O
the	O
franchise	O
to	O
not	O
feature	O
"	O
holiday	O
editions	O
"	O
,	O
a	O
trend	O
which	O
would	O
become	O
a	O
staple	O
of	O
the	O
franchise	O
.	O
</s>
<s>
It	O
is	O
also	O
the	O
only	O
game	O
in	O
the	O
series	O
to	O
be	O
an	O
exclusive	O
Microsoft	B-Application
Windows	I-Application
title	O
,	O
and	O
as	O
such	O
the	O
only	O
game	O
to	O
not	O
have	O
been	O
ported	O
to	O
other	O
platforms	O
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
:	O
The	O
Next	O
Wave	O
(	O
known	O
also	O
as	O
Chicken	B-Application
Invaders	I-Application
2	I-Application
)	O
is	O
the	O
second	O
game	O
in	O
the	O
main	O
Chicken	B-Application
Invaders	I-Application
series	O
,	O
released	O
on	O
22	O
December	O
2002	O
.	O
</s>
<s>
As	O
in	O
Chicken	B-Application
Invaders	I-Application
,	O
players	O
can	O
collect	O
chicken	O
drumsticks	O
and	O
roasts	O
to	O
receive	O
missiles	O
,	O
powerful	O
weapons	O
that	O
can	O
wipe	O
out	O
an	O
entire	O
wave	O
of	O
enemies	O
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
:	O
The	O
Next	O
Wave	O
-	O
Christmas	O
Edition	O
was	O
released	O
on	O
25	O
November	O
2003	O
,	O
and	O
was	O
initially	O
intended	O
to	O
be	O
available	O
during	O
the	O
months	O
leading	O
up	O
to	O
Christmas	O
,	O
however	O
,	O
its	O
popularity	O
caused	O
InterAction	O
studios	O
to	O
release	O
this	O
,	O
and	O
all	O
subsequent	O
Editions	O
as	O
standalone	O
games	O
.	O
</s>
<s>
The	O
game	O
and	O
its	O
Christmas	O
Edition	O
were	O
initially	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
have	O
since	O
been	O
ported	O
to	O
MacOS	B-Operating_System
,	O
Linux	B-Application
,	O
iOS	B-Application
,	O
Android	B-Application
and	O
Windows	B-Protocol
Phone	I-Protocol
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
:	O
Revenge	O
of	O
the	O
Yolk	O
(	O
known	O
also	O
as	O
Chicken	B-Application
Invaders	I-Application
3	O
)	O
is	O
the	O
third	O
game	O
in	O
the	O
Chicken	B-Application
Invaders	I-Application
main	O
series	O
,	O
released	O
on	O
11	O
November	O
2006	O
as	O
a	O
Christmas	O
Edition	O
,	O
with	O
the	O
regular	O
version	O
releasing	O
on	O
20	O
January	O
2007	O
.	O
</s>
<s>
It	O
was	O
intended	O
as	O
the	O
final	O
game	O
in	O
a	O
planned	O
Chicken	B-Application
Invaders	I-Application
trilogy	O
,	O
until	O
the	O
release	O
of	O
Ultimate	O
Omelette	O
in	O
2010	O
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
:	O
Ultimate	O
Omelette	O
(	O
known	O
also	O
as	O
Chicken	B-Application
Invaders	I-Application
4	O
)	O
is	O
the	O
fourth	O
main	O
installment	O
in	O
the	O
Chicken	B-Application
Invaders	I-Application
series	O
,	O
released	O
on	O
29	O
November	O
2010	O
as	O
a	O
demo	O
,	O
with	O
the	O
full	O
version	O
releasing	O
a	O
week	O
later	O
.	O
</s>
<s>
It	O
is	O
the	O
first	O
game	O
in	O
the	O
series	O
to	O
be	O
released	O
on	O
Valve	O
's	O
Steam	B-Application
platform	O
,	O
and	O
the	O
first	O
to	O
receive	O
an	O
accolade	O
,	O
as	O
it	O
was	O
included	O
in	O
the	O
Adrenaline	O
Vaults	O
Top	O
Casual	O
PC	O
games	O
of	O
2010	O
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
:	O
Cluck	O
of	O
the	O
Dark	O
Side	O
Chicken	B-Application
Invaders	I-Application
:	O
Cluck	O
of	O
the	O
Dark	O
Side	O
(	O
known	O
also	O
as	O
Chicken	B-Application
Invaders	I-Application
5	O
)	O
is	O
the	O
fifth	O
game	O
in	O
the	O
main	O
series	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
Linux	B-Application
,	O
iOS	B-Application
,	O
Android	B-Application
,	O
and	O
Windows	B-Protocol
Phone	I-Protocol
.	O
</s>
<s>
Chicken	B-Application
Invaders	I-Application
Universe	O
Chicken	B-Application
Invaders	I-Application
Universe	O
is	O
a	O
spin-off	O
game	O
in	O
the	O
Chicken	B-Application
Invaders	I-Application
franchise	O
released	O
on	O
14	O
December	O
2018	O
in	O
early	O
access	O
.	O
</s>
<s>
The	O
game	O
is	O
an	O
MMO	B-Application
,	O
in	O
which	O
players	O
,	O
as	O
recruits	O
fresh	O
out	O
of	O
the	O
Heroes	O
Academy	O
,	O
join	O
the	O
ranks	O
of	O
the	O
United	O
Hero	O
Force	O
to	O
fight	O
against	O
the	O
fowl	O
Henpire	O
.	O
</s>
<s>
The	O
Chicken	B-Application
Invaders	I-Application
series	O
has	O
been	O
positively	O
received	O
.	O
</s>
<s>
CNET	O
gave	O
the	O
first	O
Chicken	B-Application
Invaders	I-Application
4	O
out	O
of	O
5	O
stars	O
,	O
highlighting	O
the	O
graphics	O
and	O
sound	O
but	O
criticizing	O
the	O
game	O
's	O
lack	O
of	O
features	O
,	O
and	O
repetitive	O
gameplay	O
.	O
</s>
<s>
Gamezebo	O
gave	O
Ultimate	O
Omellete	O
,	O
a	O
4	O
out	O
of	O
5	O
stars	O
rating	O
,	O
stating	O
that	O
"	O
Chicken	B-Application
Invaders	I-Application
4	O
is	O
fantastic	O
for	O
a	O
first-timer	O
to	O
the	O
series	O
"	O
,	O
but	O
criticizing	O
that	O
"	O
for	O
veterans	O
of	O
the	O
games	O
,	O
it	O
will	O
feel	O
a	O
little	O
too	O
samey	O
.	O
</s>
<s>
The	O
game	O
currently	O
has	O
"	O
Overwhelmingly	O
Positive	O
"	O
reviews	O
on	O
the	O
Steam	B-Application
store	I-Application
,	O
and	O
was	O
voted	O
as	O
"	O
Greek	O
Game	O
of	O
the	O
Year	O
"	O
by	O
Greek	O
media	O
and	O
entertainment	O
website	O
GameWorld.gr	O
users	O
in	O
its	O
annual	O
Game	O
of	O
the	O
Year	O
Awards	O
2015	O
.	O
</s>
