<s>
Ether	B-Protocol
Saga	I-Protocol
Odyssey	I-Protocol
(	O
commonly	O
abbreviated	O
as	O
ESO	O
)	O
,	O
was	O
a	O
free-to-play	O
MMORPG	B-Protocol
developed	O
by	O
Perfect	O
World	O
.	O
</s>
<s>
Arcgames	O
shut	O
down	O
Ether	B-Protocol
Saga	I-Protocol
Odyssey	I-Protocol
on	O
January	O
4	O
,	O
2016	O
.	O
</s>
<s>
Ether	B-Protocol
Saga	I-Protocol
Online	I-Protocol
is	O
heavily	O
based	O
on	O
the	O
Chinese	O
novel	O
Journey	B-Application
to	I-Application
the	I-Application
West	I-Application
.	O
</s>
<s>
Ether	B-Protocol
Saga	I-Protocol
Online	I-Protocol
has	O
an	O
expansive	O
pet	O
system	O
in	O
which	O
pets	O
can	O
be	O
leveled	O
,	O
trained	O
,	O
evolved	O
and	O
combined	O
with	O
each	O
other	O
.	O
</s>
