<s>
Ace	B-Protocol
Online	I-Protocol
or	O
AirRivals	B-Protocol
is	O
a	O
free-to-play	O
massively	B-Application
multiplayer	I-Application
online	I-Application
game	I-Application
(	O
MMOG	B-Application
)	O
3D	O
shooter	O
developed	O
by	O
MasangSoft	O
Inc	O
.	O
and	O
owned	O
by	O
YD	O
Online	O
Corp	O
.	O
</s>
<s>
In	O
North	O
America	O
,	O
the	O
game	O
was	O
previously	O
released	O
as	O
Space	B-Protocol
Cowboy	I-Protocol
Online	I-Protocol
through	O
a	O
portal	O
known	O
as	O
gPotato	B-Application
,	O
which	O
was	O
operated	O
by	O
Gala-Net	O
.	O
</s>
<s>
Space	B-Protocol
Cowboy	I-Protocol
Onlines	I-Protocol
client	O
was	O
made	O
available	O
for	O
download	O
on	O
May	O
22	O
,	O
2006	O
,	O
and	O
the	O
service	O
went	O
live	O
on	O
May	O
26	O
,	O
2006	O
.	O
</s>
<s>
On	O
December	O
26	O
,	O
2007	O
,	O
Space	B-Protocol
Cowboy	I-Protocol
Online	I-Protocol
was	O
shut	O
down	O
.	O
</s>
<s>
Following	O
the	O
closure	O
of	O
Space	B-Protocol
Cowboy	I-Protocol
Online	I-Protocol
,	O
the	O
European	O
version	O
of	O
the	O
game	O
would	O
be	O
hosted	O
under	O
GameForge4D	O
GmbH	O
and	O
renamed	O
to	O
AirRivals	B-Protocol
in	O
early	O
2008	O
(	O
originally	O
,	O
it	O
was	O
intended	O
to	O
be	O
known	O
as	O
Flysis	B-Protocol
)	O
.	O
</s>
<s>
The	O
North	O
American	O
release	O
would	O
soon	O
follow	O
,	O
with	O
hosting	O
from	O
Suba	O
Games	O
beginning	O
on	O
September	O
26	O
,	O
2008	O
,	O
titled	O
Ace	B-Protocol
Online	I-Protocol
.	O
</s>
<s>
Other	O
publishers	O
eventually	O
followed	O
,	O
with	O
Arario	O
Corporation	O
acquiring	O
the	O
license	O
to	O
host	O
Ace	B-Protocol
Online	I-Protocol
in	O
Japan	O
and	O
launching	O
in	O
the	O
first	O
quarter	O
of	O
2009	O
,	O
while	O
Axeso5	O
officially	O
opened	O
the	O
first	O
Latin	O
American	O
Ace	B-Protocol
Online	I-Protocol
server	O
in	O
February	O
2011	O
.	O
</s>
<s>
In	O
2016	O
,	O
GameForge4D	O
GmbH	O
relinquished	O
the	O
rights	O
for	O
hosting	O
AirRivals	B-Protocol
,	O
which	O
were	O
then	O
handed	O
to	O
MasangSoft	O
.	O
</s>
<s>
Players	O
were	O
offered	O
the	O
chance	O
to	O
transfer	O
their	O
gears	O
and	O
in-game	O
items	O
to	O
a	O
new	O
server	O
,	O
where	O
the	O
European	O
version	O
would	O
once	O
again	O
be	O
renamed	O
,	O
this	O
time	O
to	O
Ace	B-Protocol
Online	I-Protocol
.	O
</s>
<s>
In	O
Ace	B-Protocol
Online	I-Protocol
,	O
players	O
pilot	O
their	O
own	O
individual	O
starfighters	O
(	O
called	O
"	O
Gears	O
"	O
)	O
throughout	O
a	O
number	O
of	O
maps	O
,	O
including	O
terrestrial	O
,	O
lunar	O
,	O
and	O
space	O
maps	O
.	O
</s>
<s>
Ace	B-Protocol
Online	I-Protocol
is	O
a	O
largely	O
player	O
vs.	O
player-oriented	O
game	O
(	O
PvP	O
)	O
,	O
with	O
character	O
leveling	O
and	O
item	O
acquisition	O
achieved	O
through	O
combat	O
against	O
non-player	O
characters	O
and	O
the	O
completion	O
of	O
missions	O
.	O
</s>
<s>
As	O
in	O
other	O
MMORPGs	O
,	O
players	O
can	O
trade	O
items	O
,	O
customize	O
their	O
gears	O
,	O
form	O
parties	O
(	O
"	O
formations	O
"	O
)	O
and	O
guilds	B-Application
(	O
"	O
brigades	O
"	O
)	O
,	O
and	O
fight	O
with	O
other	O
players	O
via	O
PvP	O
combat	O
.	O
</s>
<s>
Almost	O
all	O
of	O
the	O
combat	O
in	O
Ace	B-Protocol
Online	I-Protocol
is	O
aerial	O
,	O
from	O
the	O
third-person	O
view	O
.	O
</s>
<s>
Ace	B-Protocol
Online	I-Protocol
is	O
a	O
free-to-play	O
MMO	B-Application
,	O
with	O
the	O
option	O
of	O
buying	O
in-game	O
items	O
via	O
an	O
"	O
Item	O
Shop	O
"	O
that	O
can	O
be	O
accessed	O
when	O
the	O
player	O
interacts	O
with	O
the	O
item	O
shop	O
icon	O
in	O
the	O
bottom	O
right	O
corner	O
of	O
the	O
screen	O
,	O
or	O
by	O
speaking	O
to	O
an	O
NPC	O
in	O
the	O
main	O
hub	O
.	O
</s>
<s>
A	O
player	O
can	O
only	O
purchase	O
the	O
items	O
from	O
the	O
item	O
shop	O
using	O
currency	O
that	O
must	O
be	O
purchased	O
through	O
a	O
website	O
via	O
a	O
Ace	B-Protocol
Online	I-Protocol
account	O
.	O
</s>
<s>
Ace	B-Protocol
Online	I-Protocol
offers	O
a	O
PvP	O
system	O
of	O
"	O
Nation	O
Wars	O
"	O
,	O
which	O
revolves	O
around	O
a	O
point	O
system	O
:	O
"	O
National	O
Contribution	O
Points	O
"	O
(	O
NCP	O
)	O
.	O
</s>
<s>
Raids	B-Protocol
-	O
The	O
two	O
nations	O
(	O
BCU	O
and	O
ANI	O
)	O
are	O
separated	O
by	O
a	O
series	O
of	O
maps	O
.	O
</s>
<s>
Nation	O
Wars	O
involve	O
a	O
constant	O
battle	O
between	O
these	O
two	O
nations	O
to	O
raid	B-Protocol
and	O
defend	O
these	O
maps	O
,	O
which	O
provide	O
strategic	O
and	O
economic	O
advantages	O
.	O
</s>
<s>
Nation	O
Leader	O
-	O
Every	O
month	O
,	O
players	O
who	O
are	O
level	O
70	O
or	O
higher	O
,	O
have	O
2000	O
fame	O
,	O
and	O
lead	O
a	O
brigade	O
(	O
usually	O
called	O
"	O
guild	B-Application
or	O
"	O
clan	O
"	O
in	O
other	O
MMOs	O
)	O
with	O
at	O
least	O
30	O
people	O
that	O
possess	O
1000	O
or	O
more	O
fame	O
can	O
run	O
for	O
the	O
nation	O
leader	O
position	O
.	O
</s>
<s>
Ace	B-Protocol
Online	I-Protocol
contains	O
a	O
duel	O
based	O
system	O
where	O
players	O
may	O
challenge	O
other	O
players	O
in	O
either	O
a	O
1	O
on	O
1	O
duel	O
or	O
"	O
Formation	O
Battle	O
"	O
(	O
up	O
to	O
6	O
players	O
per	O
formation	O
)	O
.	O
</s>
