<s>
Planetbase	B-Application
is	O
a	O
space	O
simulation	O
and	O
strategy	B-Application
video	I-Application
game	I-Application
developed	O
by	O
Madruga	O
Works	O
which	O
was	O
released	O
on	O
October	O
16	O
,	O
2015	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
January	O
8	O
,	O
2016	O
for	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
The	O
colonists	O
can	O
be	O
directed	O
to	O
mine	O
different	O
kinds	O
of	O
metal	O
and	O
manufacture	O
robots	B-Algorithm
.	O
</s>
<s>
Robots	B-Algorithm
can	O
be	O
constructed	O
to	O
complete	O
the	O
more	O
monotonous	O
tasks	O
.	O
</s>
<s>
The	O
survival	O
of	O
the	O
colony	O
is	O
also	O
challenged	O
by	O
natural	O
disasters	O
like	O
sandstorms	B-Application
,	O
solar	O
flares	O
,	O
blizzards	O
,	O
and	O
meteors	B-Language
.	O
</s>
<s>
There	O
are	O
29	O
different	O
structures	O
to	O
be	O
built	O
,	O
five	O
types	O
of	O
human	O
workers	O
,	O
and	O
three	O
types	O
of	O
robots	B-Algorithm
.	O
</s>
