<s>
Iron	B-Application
Grip	I-Application
:	I-Application
Marauders	I-Application
was	O
a	O
free-to-play	O
online	O
war	O
game	O
with	O
3D	O
turn-based	O
battles	O
.	O
</s>
<s>
Iron	B-Application
Grip	I-Application
:	I-Application
Marauders	I-Application
consists	O
of	O
two	O
parts	O
:	O
the	O
strategic	O
resource	O
management	O
and	O
the	O
tactical	O
3D	O
battles	O
.	O
</s>
<s>
 [ 3 ] 	O
When	O
a	O
battle	O
commences	O
,	O
the	O
game	O
switches	O
to	O
a	O
3D	O
view	O
using	O
the	O
Unity	B-Application
game	I-Application
engine	I-Application
.	O
</s>
<s>
Marauders	O
uses	O
the	O
Unity	B-Application
game	I-Application
engine	I-Application
to	O
depict	O
fights	O
on	O
a	O
3D	O
battlefield	O
.	O
</s>
<s>
Iron	B-Application
Grip	I-Application
:	I-Application
Marauders	I-Application
was	O
announced	O
by	O
developer	O
and	O
publisher	O
ISOTX	O
on	O
May	O
13	O
,	O
2010	O
.	O
</s>
<s>
 [ 12 ] 	O
The	O
developers	O
also	O
upgraded	O
the	O
internal	O
Unity	B-Application
engine	I-Application
from	O
2.7	O
to	O
3.0	O
,	O
with	O
further	O
plans	O
to	O
make	O
use	O
of	O
the	O
new	O
engine	O
's	O
capabilities	O
to	O
add	O
lighting	O
effects	O
and	O
superior	O
terrain	O
maps	O
in	O
later	O
patches	O
.	O
</s>
