<s>
CyClones	B-Application
is	O
a	O
first-person	O
shooter	O
video	O
game	O
for	O
MS-DOS	B-Application
developed	O
by	O
Raven	O
Software	O
and	O
published	O
by	O
Strategic	O
Simulations	O
in	O
1994	O
.	O
</s>
<s>
CyClones	B-Application
is	O
set	O
in	O
the	O
closing	O
of	O
the	O
20th	O
century	O
,	O
when	O
wars	O
and	O
pollution	O
devastated	O
many	O
countries	O
in	O
the	O
world	O
and	O
led	O
to	O
a	O
policy	O
of	O
isolation	O
for	O
many	O
governments	O
.	O
</s>
<s>
These	O
humanoids	O
were	O
then	O
dubbed	O
"	O
CyClones	B-Application
"	O
at	O
the	O
time	O
the	O
aliens	O
attacked	O
,	O
A.I.	O
</s>
<s>
The	O
gameplay	O
follows	O
the	O
standard	O
first-person	O
shooter	O
formula	O
set	O
by	O
Doom	B-Application
the	O
year	O
before	O
,	O
requiring	O
the	O
player	O
to	O
navigate	O
several	O
levels	O
while	O
fighting	O
enemies	O
and	O
activating	O
switches	O
or	O
seeking	O
keys	O
to	O
gain	O
access	O
to	O
different	O
areas	O
.	O
</s>
<s>
The	O
enemies	O
encountered	O
include	O
the	O
CyClones	B-Application
humanoids	O
,	O
as	O
well	O
as	O
several	O
robotic	O
and	O
alien	O
creatures	O
.	O
</s>
<s>
A	O
distinguishing	O
aspect	O
of	O
CyClones	B-Application
 '	O
gameplay	O
is	O
the	O
aiming	O
system	O
.	O
</s>
<s>
Unlike	O
Doom	B-Application
and	O
most	O
other	O
first	O
person	O
shooter	O
games	O
of	O
the	O
era	O
,	O
CyClones	B-Application
implemented	O
a	O
mouse	O
aiming	O
system	O
,	O
featuring	O
a	O
movable	O
aiming	O
reticle	O
,	O
and	O
allowed	O
players	O
to	O
look	O
up	O
and	O
down	O
,	O
and	O
to	O
jump	O
.	O
</s>
<s>
Also	O
unlike	O
Doom	B-Application
,	O
items	O
are	O
picked	O
up	O
not	O
by	O
walking	O
over	O
them	O
but	O
by	O
clicking	O
on	O
them	O
with	O
the	O
mouse	O
.	O
</s>
<s>
This	O
control	O
system	O
is	O
very	O
similar	O
than	O
what	O
was	O
later	O
used	O
by	O
the	O
game	O
System	B-Application
Shock	I-Application
.	O
</s>
<s>
Development	O
for	O
CyClones	B-Application
started	O
in	O
early	O
1994	O
,	O
when	O
Raven	O
Software	O
's	O
developers	O
split	O
in	O
two	O
teams	O
:	O
one	O
working	O
with	O
id	O
software	O
's	O
Doom	B-Application
engine	O
to	O
create	O
a	O
fantasy	O
game	O
which	O
later	O
evolved	O
into	O
Heretic	B-Application
,	O
while	O
the	O
other	O
team	O
started	O
on	O
a	O
project	O
that	O
was	O
to	O
use	O
the	O
engine	O
from	O
ShadowCaster	B-Application
to	O
create	O
a	O
futuristic	O
first-person	O
shooter	O
game	O
for	O
Strategic	O
Simulations	O
.	O
</s>
<s>
However	O
,	O
the	O
ShadowCaster	B-Application
engine	O
had	O
by	O
then	O
become	O
dated	O
,	O
especially	O
when	O
compared	O
to	O
Doom	B-Application
,	O
and	O
so	O
Raven	O
produced	O
a	O
new	O
in-house	O
engine	O
,	O
developed	O
mainly	O
by	O
Carl	O
Stika	O
.	O
</s>
<s>
The	O
engine	O
was	O
nicknamed	O
"	O
Steam	O
"	O
and	O
offered	O
significant	O
improvements	O
over	O
the	O
Wolfenstein	O
3D-derived	O
ShadowCaster	B-Application
engine	O
,	O
such	O
as	O
moving	O
platforms	O
,	O
catwalks	O
,	O
sloped	O
floors	O
,	O
and	O
transparent	O
textures	O
.	O
</s>
<s>
However	O
,	O
the	O
engine	O
was	O
still	O
limited	O
to	O
90-degree	O
wall	O
geometry	O
,	O
akin	O
to	O
Rise	B-Application
of	I-Application
the	I-Application
Triad	I-Application
and	O
some	O
other	O
shooters	O
of	O
the	O
period	O
.	O
</s>
