<s>
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
is	O
a	O
2010	O
puzzle	O
video	O
game	O
developed	O
by	O
Ratloop	O
and	O
published	O
by	O
Clickgamer.com	O
.	O
</s>
<s>
Developed	O
over	O
the	O
course	O
of	O
6	O
months	O
by	O
Ratloop	O
co-founder	O
Lucas	O
Pope	O
and	O
programmer	O
Keiko	O
Ishizaka	O
,	O
the	O
game	O
was	O
originally	O
designed	O
to	O
be	O
a	O
roguelike	O
action	B-Application
game	I-Application
,	O
but	O
eventually	O
turned	O
into	O
a	O
puzzler	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
in	O
2010	O
for	O
iOS	B-Application
.	O
</s>
<s>
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
is	O
a	O
puzzle	O
video	O
game	O
with	O
a	O
top-down	O
perspective	O
,	O
set	O
in	O
London	O
.	O
</s>
<s>
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
has	O
two	O
additional	O
modes	O
besides	O
the	O
campaigns	O
:	O
a	O
"	O
Bounties	O
"	O
mode	O
,	O
and	O
an	O
endless	O
mode	O
where	O
the	O
player	O
completes	O
as	O
many	O
timed	O
puzzles	O
as	O
possible	O
before	O
either	O
running	O
out	O
of	O
time	O
or	O
failing	O
to	O
complete	O
a	O
puzzle	O
.	O
</s>
<s>
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
was	O
developed	O
by	O
Ratloop	O
co-founder	O
Lucas	O
Pope	O
and	O
programmer	O
Keiko	O
Ishizaka	O
,	O
his	O
wife	O
.	O
</s>
<s>
The	O
game	O
was	O
originally	O
a	O
roguelike	O
action	B-Application
game	I-Application
;	O
Pope	O
said	O
that	O
he	O
"	O
had	O
a	O
much	O
easier	O
time	O
designing	O
the	O
puzzle	O
elements	O
"	O
and	O
that	O
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
eventually	O
turned	O
into	O
a	O
puzzler	O
.	O
</s>
<s>
Pope	O
had	O
been	O
creating	O
app	O
prototypes	O
to	O
familiarize	O
himself	O
with	O
the	O
iPhone	B-Operating_System
SDK	I-Operating_System
;	O
the	O
light/shadow	O
concept	O
arose	O
from	O
his	O
prototyping	O
work	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
July	O
10	O
,	O
2010	O
for	O
iPhone	B-Device
and	O
was	O
published	O
by	O
Clickgamer.com,	O
a	O
subsidiary	O
of	O
Chillingo	O
.	O
</s>
<s>
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
received	O
"	O
favorable	O
"	O
reviews	O
according	O
to	O
the	O
review	O
aggregator	O
Metacritic	O
.	O
</s>
<s>
He	O
also	O
praised	O
the	O
game	O
's	O
dialogue	O
as	O
"	O
quick	O
and	O
witty	O
"	O
;	O
Rigney	O
described	O
it	O
as	O
"	O
amusing	O
"	O
and	O
with	O
"	O
a	O
quasi	O
Sherlock	B-Application
Holmes	I-Application
vibe	O
"	O
.	O
</s>
<s>
Critics	O
also	O
praised	O
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
's	O
visuals	O
:	O
Levi	O
Buchanan	O
of	O
IGN	O
complimented	O
the	O
design	O
of	O
the	O
rays	O
of	O
light	O
,	O
while	O
Rattray	O
praised	O
various	O
details	O
like	O
the	O
"	O
character	O
reactions	O
,	O
comic-esque	O
onomatopoeia	O
,	O
and	O
enemy	O
animation	O
that	O
ensues	O
when	O
they	O
are	O
in	O
the	O
light	O
"	O
.	O
</s>
<s>
Helsing	B-Operating_System
's	I-Operating_System
Fire	I-Operating_System
won	O
the	O
"	O
Best	O
Mobile	O
Game	O
"	O
award	O
at	O
the	O
2011	O
Independent	O
Games	O
Festival	O
,	O
with	O
honorable	O
mentions	O
for	O
the	O
"	O
Excellence	O
in	O
Visual	O
Art	O
"	O
and	O
"	O
Excellence	O
in	O
Design	O
"	O
awards	O
.	O
</s>
