<s>
Tribal	B-Application
Trouble	I-Application
is	O
a	O
real-time	O
strategy	O
video	O
game	O
for	O
PC	B-Device
.	O
</s>
<s>
The	O
game	O
pits	O
natives	O
of	O
tropical	O
islands	O
against	O
invading	O
Vikings	B-Application
.	O
</s>
<s>
It	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
In	O
September	O
2014	O
the	O
game	O
's	O
source	O
code	O
was	O
released	O
to	O
the	O
public	O
on	O
GitHub	B-Application
and	O
is	O
now	O
open	B-Application
source	I-Application
under	O
the	O
GPLv2	O
.	O
</s>
<s>
Development	O
continues	O
in	O
a	O
community	B-Application
fork	I-Application
.	O
</s>
<s>
Inside	B-Application
Mac	I-Application
Games	I-Application
reviewed	O
the	O
game	O
.	O
</s>
<s>
A	O
sequel	O
,	O
Tribal	B-Application
Trouble	I-Application
2	O
,	O
was	O
in	O
development	O
in	O
2011	O
.	O
</s>
