<s>
It	O
was	O
used	O
first	O
in	O
the	O
game	O
Battlezone	B-Application
II	I-Application
:	I-Application
Combat	I-Application
Commander	I-Application
and	O
later	O
used	O
in	O
several	O
Star	B-Application
Wars	I-Application
games	O
including	O
the	O
popular	O
Battlefront	B-Application
series	I-Application
.	O
</s>
<s>
Battlezone	B-Application
II	I-Application
:	I-Application
Combat	I-Application
Commander	I-Application
and	O
Dark	B-Application
Reign	I-Application
2	I-Application
both	O
feature	O
an	O
in-engine	O
editor	O
accessible	O
via	O
commands	O
.	O
</s>
<s>
It	O
was	O
given	O
additional	O
3D	O
functionality	O
with	O
Dark	B-Application
Reign	I-Application
2	I-Application
,	O
which	O
was	O
further	O
improved	O
upon	O
for	O
Army	B-Device
Men	I-Device
:	I-Device
RTS	I-Device
.	O
</s>
<s>
The	O
engine	O
was	O
revamped	O
for	O
Star	B-Application
Wars	I-Application
:	I-Application
The	I-Application
Clone	I-Application
Wars	I-Application
to	O
accommodate	O
consoles	O
and	O
third	O
person	O
gameplay	O
.	O
</s>
<s>
The	O
engine	O
was	O
again	O
retooled	O
for	O
Star	B-Language
Wars	I-Language
:	I-Language
Battlefront	I-Language
and	O
the	O
level	O
editor	O
was	O
made	O
a	O
separate	O
entity	O
from	O
the	O
game	O
engine	O
.	O
</s>
<s>
A	O
set	O
of	O
modding	O
tools	O
including	O
ZeroEdit	O
,	O
the	O
new	O
level	O
creation	O
tool	O
,	O
were	O
released	O
for	O
use	O
with	O
Star	B-Language
Wars	I-Language
:	I-Language
Battlefront	I-Language
on	O
December	O
23	O
,	O
2004	O
.	O
</s>
<s>
An	O
updated	O
version	O
of	O
the	O
tools	O
were	O
released	O
on	O
February	O
2	O
,	O
2006	O
for	O
Star	B-Language
Wars	I-Language
:	I-Language
Battlefront	I-Language
II	I-Language
.	O
</s>
<s>
Havok	B-General_Concept
physics	I-General_Concept
engine	I-General_Concept
capabilities	O
were	O
integrated	O
with	O
Zero	O
for	O
Mercenaries	B-Language
:	I-Language
Playground	I-Language
of	I-Language
Destruction	I-Language
.	O
</s>
<s>
A	O
new	O
engine	O
was	O
built	O
for	O
2008	O
's	O
Mercenaries	B-Language
2	O
:	O
World	O
in	O
Flames	O
.	O
</s>
