<s>
Luna	B-Protocol
Online	I-Protocol
is	O
a	O
free-to-play	O
massively	B-Protocol
multiplayer	I-Protocol
online	I-Protocol
role-playing	I-Protocol
video	O
game	O
developed	O
by	O
South	O
Korean	O
studio	O
EYA	O
Interactive	O
.	O
</s>
<s>
The	O
game	O
's	O
North	O
American	O
version	O
,	O
which	O
was	O
published	O
by	O
gPotato	B-Application
,	O
was	O
first	O
announced	O
on	O
July	O
21	O
,	O
2008	O
,	O
and	O
received	O
a	O
closed	O
beta	O
that	O
began	O
on	O
April	O
17	O
,	O
2009	O
,	O
while	O
an	O
open	O
beta	O
started	O
on	O
May	O
14	O
,	O
2009	O
.	O
</s>
<s>
On	O
March	O
27	O
,	O
2012	O
,	O
gPotato	B-Application
shut	O
down	O
the	O
servers	O
for	O
the	O
North	O
American	O
versions	O
of	O
Luna	B-Protocol
Online	I-Protocol
and	O
Prius	B-Protocol
Online	I-Protocol
.	O
</s>
<s>
On	O
April	O
1	O
,	O
2016	O
,	O
the	O
company	O
relaunched	O
the	O
game	O
via	O
Steam	O
,	O
titling	O
it	O
"	O
Luna	B-Protocol
Online	I-Protocol
:	O
Reborn	O
"	O
.	O
</s>
