<s>
Perpetuum	B-Protocol
is	O
a	O
video	O
game	O
by	O
Avatar	O
Creations	O
Ltd	O
.	O
</s>
<s>
It	O
is	O
a	O
player-driven	O
persistent-world	O
MMORPG	B-Protocol
set	O
in	O
a	O
science	O
fiction	O
ground	O
setting	O
.	O
</s>
<s>
Players	O
of	O
Perpetuum	B-Protocol
are	O
able	O
to	O
participate	O
in	O
a	O
number	O
of	O
in-game	O
professions	O
and	O
activities	O
,	O
including	O
mining	O
,	O
logistics	O
,	O
missions	O
,	O
manufacturing	O
,	O
trading	O
,	O
artifact	O
hunting	O
and	O
combat	O
(	O
both	O
player	O
versus	O
environment	O
and	O
player	O
versus	O
player	O
)	O
.	O
</s>
<s>
Perpetuum	B-Protocol
was	O
first	O
released	O
worldwide	O
via	O
a	O
digital	O
distribution	O
scheme	O
on	O
25	O
Nov	O
2010	O
,	O
following	O
a	O
period	O
of	O
closed	O
and	O
open	O
beta	O
testing	O
.	O
</s>
<s>
The	O
first	O
major	O
upgrade	O
was	O
the	O
version	O
of	O
Perpetuum	B-Protocol
dubbed	O
Terra	O
Incognita	O
,	O
which	O
was	O
released	O
on	O
4	O
May	O
2011	O
.	O
</s>
<s>
In	O
April	O
2014	O
,	O
Perpetuum	B-Protocol
has	O
dropped	O
its	O
subscription	O
payment	O
model	O
for	O
a	O
pay	O
to	O
play	O
payment	O
model.	O
,	O
and	O
released	O
on	O
Steam	O
,	O
being	O
previously	O
greenlit	O
.	O
</s>
<s>
Set	O
somewhere	O
after	O
2208	O
,	O
the	O
back	O
story	O
of	O
Perpetuum	B-Protocol
explains	O
that	O
humanity	O
,	O
in	O
search	O
of	O
alternative	O
energy	O
sources	O
,	O
has	O
stumbled	O
upon	O
technology	O
to	O
create	O
tiny	O
particle-sized	O
wormholes	O
,	O
creating	O
shortcuts	O
through	O
spacetime	O
.	O
</s>
<s>
As	O
it	O
stands	O
,	O
human	O
pilots	O
known	O
as	O
agents	O
control	O
their	O
robots	O
remotely	O
,	O
participating	O
in	O
the	O
Perpetuum	B-Protocol
Project	O
,	O
with	O
their	O
main	O
goal	O
to	O
transfer	O
as	O
much	O
energy	O
as	O
possible	O
back	O
to	O
earth	O
.	O
</s>
<s>
Each	O
Perpetuum	B-Protocol
account	O
allows	O
for	O
up	O
to	O
three	O
characters	O
to	O
be	O
made	O
.	O
</s>
<s>
The	O
playing	O
environment	O
in	O
Perpetuum	B-Protocol
consists	O
of	O
several	O
islands	O
,	O
and	O
have	O
either	O
alpha	O
,	O
beta	O
or	O
gamma	O
status	O
.	O
</s>
<s>
Unlike	O
most	O
other	O
massively	B-Application
multiplayer	I-Application
online	I-Application
games	I-Application
,	O
player	O
characters	O
in	O
Perpetuum	B-Protocol
advance	O
continuously	O
over	O
time	O
by	O
the	O
accumulation	O
of	O
extension	O
points	O
(	O
EP	O
)	O
,	O
a	O
passive	O
process	O
that	O
occurs	O
in	O
real	O
world	O
time	O
so	O
that	O
the	O
advancement	O
process	O
continues	O
even	O
if	O
the	O
player	O
is	O
not	O
logged	O
in	O
.	O
</s>
<s>
The	O
in-game	B-Application
economy	I-Application
in	O
Perpetuum	B-Protocol
is	O
an	O
open	O
economy	O
that	O
is	O
largely	O
player-driven	O
.	O
</s>
<s>
The	O
in-game	B-Application
currency	I-Application
is	O
called	O
NIC	O
,	O
an	O
abbreviation	O
for	O
Nian	O
Credit	O
(	O
the	O
events	O
of	O
the	O
game	O
take	O
place	O
on	O
the	O
planet	O
Nia	O
)	O
.	O
</s>
<s>
Robots	O
in	O
Perpetuum	B-Protocol
are	O
organized	O
into	O
four	O
general	O
classes	O
:	O
Light	O
robots	O
,	O
assault	O
robots	O
,	O
mechs	O
and	O
heavy	O
mechs	O
.	O
</s>
<s>
Players	O
have	O
several	O
options	O
when	O
playing	O
Perpetuum	B-Protocol
in	O
regards	O
to	O
how	O
they	O
interact	O
with	O
the	O
community	O
.	O
</s>
<s>
Users	O
start	O
playing	O
Perpetuum	B-Protocol
by	O
buying	O
the	O
game	O
.	O
</s>
