<s>
Dead	B-Protocol
Frontier	I-Protocol
is	O
a	O
free-to-play	O
,	O
browser-based	O
massively	B-Application
multiplayer	I-Application
online	I-Application
game	I-Application
which	O
takes	O
place	O
in	O
a	O
post-apocalyptic	O
,	O
zombie-infested	O
setting	O
.	O
</s>
<s>
It	O
is	O
operated	O
by	O
Creaky	O
Corpse	O
Ltd	O
.	O
Dead	B-Protocol
Frontier	I-Protocol
was	O
released	O
for	O
open	O
beta	O
on	O
April	O
21	O
,	O
2008	O
,	O
and	O
has	O
over	O
ten	O
million	O
registered	O
accounts	O
.	O
</s>
<s>
Once	O
the	O
registration	O
process	O
is	O
completed	O
,	O
the	O
player	O
creates	O
an	O
avatar	B-Application
which	O
can	O
be	O
used	O
to	O
play	O
in	O
a	O
3D	O
computer	O
graphics	O
environment	O
(	O
although	O
,	O
with	O
certain	O
settings	O
accessible	O
via	O
the	O
forum	O
,	O
players	O
can	O
revert	O
to	O
the	O
classic	O
2D	O
version	O
,	O
mentioned	O
below	O
)	O
.	O
</s>
<s>
With	O
the	O
avatar	B-Application
,	O
the	O
player	O
is	O
also	O
allowed	O
to	O
interact	O
with	O
multiple	O
services	O
involving	O
trades	O
of	O
in-game	O
items	O
and	O
communication	O
with	O
other	O
players	O
.	O
</s>
<s>
Dead	B-Protocol
Frontier	I-Protocol
takes	O
place	O
in	O
Fairview	O
City	O
,	O
a	O
post-apocalyptic	O
setting	O
which	O
is	O
infested	O
with	O
zombies	O
.	O
</s>
<s>
Players	O
are	O
shown	O
on	O
the	O
screen	O
in	O
the	O
outpost	O
as	O
customizable	O
avatars	B-Application
.	O
</s>
<s>
As	O
other	O
MMORPGs	O
introduced	O
paid	O
memberships	O
,	O
Dead	B-Protocol
Frontier	I-Protocol
introduced	O
the	O
concept	O
of	O
a	O
Gold	O
Membership	O
,	O
allowing	O
players	O
to	O
directly	O
influence	O
the	O
game	O
mechanics	O
through	O
a	O
credit	O
system	O
.	O
</s>
<s>
Weapons	O
,	O
armor	O
,	O
clothing	O
,	O
ammunition	O
,	O
limited	O
edition	O
items	O
,	O
mission	O
items	O
and	O
Limited	O
time	O
stat	O
boosters	O
referred	O
to	O
as	O
"	O
Drugs	O
"	O
are	O
a	O
main	O
part	O
of	O
gameplay	O
within	O
Dead	B-Protocol
Frontier	I-Protocol
.	O
</s>
<s>
A	O
player-run	O
market	O
system	O
(	O
named	O
the	O
Dead	B-Protocol
Frontier	I-Protocol
Mega	O
Mall	O
)	O
was	O
created	O
on	O
October	O
1	O
,	O
2008	O
,	O
to	O
facilitate	O
trading	O
among	O
players	O
.	O
</s>
<s>
A	O
new	O
market	O
system	O
was	O
also	O
released	O
,	O
replacing	O
the	O
Dead	B-Protocol
Frontier	I-Protocol
Mega	O
Mall	O
.	O
</s>
<s>
As	O
of	O
2015	O
,	O
Dead	B-Protocol
Frontier	I-Protocol
now	O
has	O
its	O
own	O
standalone	O
client	O
.	O
</s>
<s>
A	O
sequel	O
,	O
Dead	B-Protocol
Frontier	I-Protocol
2	O
,	O
was	O
released	O
on	O
September	O
5	O
,	O
2018	O
via	O
Steam	O
.	O
</s>
<s>
In	O
September	O
,	O
2008	O
,	O
as	O
a	O
promotion	O
for	O
Dead	B-Protocol
Frontier	I-Protocol
,	O
a	O
text	O
based	O
adventure	O
game	O
was	O
released	O
titled	O
Dead	B-Protocol
Frontier	I-Protocol
:	O
Outbreak	O
.	O
</s>
<s>
The	O
game	O
was	O
followed	O
by	O
a	O
sequel	O
,	O
Dead	B-Protocol
Frontier	I-Protocol
:	O
Outbreak	O
2	O
.	O
</s>
