<s>
They	B-Application
Are	I-Application
Billions	I-Application
is	O
a	O
post-apocalyptic	O
steampunk	O
real-time	O
strategy	O
survival	B-Application
video	I-Application
game	I-Application
developed	O
and	O
published	O
by	O
Numantian	O
Games	O
.	O
</s>
<s>
Available	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
it	O
was	O
released	O
onto	O
Steam	B-Application
's	O
Early	O
Access	O
program	O
with	O
a	O
survival	B-Application
mode	O
in	O
December	O
2017	O
.	O
</s>
<s>
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Xbox	B-Device
One	I-Device
versions	O
were	O
published	O
by	O
BlitWorks	O
on	O
July	O
1	O
,	O
2019	O
.	O
</s>
<s>
They	B-Application
Are	I-Application
Billions	I-Application
pits	O
the	O
player	O
in	O
a	O
randomly	O
generated	O
steampunk	O
themed	O
,	O
zombie-infested	O
world	O
.	O
</s>
<s>
In	O
late	O
22nd	O
century	O
North	O
America	O
,	O
a	O
world-wide	O
rabies-like	O
pandemic	O
caused	O
by	O
a	O
mutated	O
strain	O
of	O
rabies	O
called	O
Rabies	O
Z	O
has	O
triggered	O
a	O
zombie	B-Application
apocalypse	I-Application
,	O
especially	O
in	O
the	O
world	O
's	O
megacities	O
.	O
</s>
<s>
They	B-Application
Are	I-Application
Billions	I-Application
was	O
announced	O
by	O
Numantian	O
Games	O
on	O
May	O
30	O
,	O
2017	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
December	O
13	O
,	O
2017	O
on	O
Steam	B-Application
's	O
Early	O
Access	O
program	O
with	O
survival	B-Application
mode	O
.	O
</s>
<s>
The	O
game	O
quickly	O
rose	O
to	O
the	O
top	O
selling	O
charts	O
on	O
both	O
Steam	B-Application
and	O
the	O
Humble	O
Bundle	O
storefront	O
.	O
</s>
<s>
The	O
PC	O
version	O
of	O
They	B-Application
Are	I-Application
Billions	I-Application
has	O
77/100	O
on	O
Metacritic	O
.	O
</s>
<s>
The	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
version	O
of	O
They	B-Application
Are	I-Application
Billions	I-Application
was	O
the	O
twentieth	O
bestselling	O
retail	O
game	O
during	O
its	O
first	O
week	O
of	O
release	O
in	O
Japan	O
,	O
with	O
3,046	O
copies	O
being	O
sold	O
.	O
</s>
