<s>
Flash	B-Operating_System
Element	I-Operating_System
TD	I-Operating_System
is	O
a	O
Flash-based	O
tower	B-Application
defense	I-Application
browser	B-Protocol
game	I-Protocol
created	O
by	O
American	O
developer	O
David	B-Operating_System
Scott	I-Operating_System
and	O
launched	O
in	O
January	O
2007	O
.	O
</s>
<s>
David	B-Operating_System
Scott	I-Operating_System
got	O
the	O
inspiration	O
for	O
Flash	B-Operating_System
Element	I-Operating_System
TD	I-Operating_System
in	O
2006	O
.	O
</s>
<s>
He	O
noticed	O
that	O
no	O
one	O
had	O
created	O
a	O
Tower	B-Application
Defense	I-Application
game	I-Application
using	O
Macromedia	B-Operating_System
Flash	I-Operating_System
and	O
only	O
started	O
work	O
on	O
Flash	B-Operating_System
Element	I-Operating_System
TD	I-Operating_System
as	O
a	O
technical	O
exercise	O
to	O
see	O
if	O
it	O
was	O
possible	O
.	O
</s>
<s>
The	O
map	O
and	O
name	O
is	O
based	O
on	O
the	O
"	O
Element	O
TD	O
"	O
map	O
created	O
for	O
the	O
real-time	O
strategy	O
game	O
Warcraft	B-Application
III	I-Application
by	O
Brian	O
Powers	O
and	O
Evan	O
Hatampour	O
,	O
David	B-Operating_System
Scott	I-Operating_System
created	O
a	O
much	O
simpler	O
version	O
of	O
the	O
map	O
that	O
could	O
be	O
played	O
using	O
only	O
a	O
browser	O
.	O
</s>
<s>
It	O
eventually	O
found	O
its	O
way	O
onto	O
several	O
Flash	B-Protocol
game	I-Protocol
sites	O
,	O
four	O
years	O
later	O
can	O
be	O
found	O
on	O
25,950	O
sites	O
and	O
has	O
had	O
over	O
183	O
million	O
views	O
.	O
</s>
<s>
Flash	B-Operating_System
Element	I-Operating_System
TD	I-Operating_System
has	O
not	O
been	O
updated	O
since	O
and	O
still	O
increases	O
in	O
popularity	O
some	O
two	O
years	O
on	O
.	O
</s>
<s>
In	O
December	O
2007	O
,	O
Scott	O
and	O
Paul	B-Operating_System
Preece	I-Operating_System
also	O
created	O
the	O
,	O
whose	O
flagship	O
game	O
was	O
a	O
multiplayer	O
version	O
of	O
Desktop	B-Operating_System
Tower	I-Operating_System
Defense	I-Operating_System
.	O
</s>
<s>
Flash	B-Operating_System
Element	I-Operating_System
TD	I-Operating_System
was	O
played	O
by	O
nearly	O
500,000	O
users	O
within	O
the	O
first	O
few	O
hours	O
after	O
launch	O
.	O
</s>
