<s>
Catch	B-Application
the	I-Application
Sperm	I-Application
is	O
a	O
Swiss	O
computer	O
game	O
recognized	O
as	O
an	O
entertaining	O
way	O
for	O
health	O
professionals	O
to	O
promote	O
prevention	O
of	O
HIV	O
.	O
</s>
<s>
The	O
original	O
Catch	B-Application
the	I-Application
Sperm	I-Application
(	O
now	O
known	O
as	O
CTS	O
Style	O
I	O
)	O
is	O
a	O
3.4-megabyte	O
action	O
game	O
created	O
in	O
2001	O
and	O
updated	O
in	O
2002	O
and	O
2003	O
by	O
Phenomedia	O
AG	O
CH	O
for	O
UNICEF	O
and	O
the	O
Swiss	O
Federal	O
Office	O
of	O
Public	O
Health	O
's	O
Stop	O
AIDS	B-Device
Campaign	O
.	O
</s>
<s>
The	O
game	O
can	O
be	O
played	O
on	O
personal	B-Device
computer	I-Device
,	O
mobile	O
telephone	O
,	O
or	O
cellular	O
telephone	O
.	O
</s>
<s>
Catch	B-Application
the	I-Application
Sperm	I-Application
is	O
available	O
in	O
seven	O
versions	O
:	O
</s>
<s>
The	O
original	O
Catch	B-Application
the	I-Application
Sperm	I-Application
(	O
CTS	O
Style	O
1	O
)	O
was	O
created	O
in	O
2001	O
.	O
</s>
<s>
CTS	O
Style	O
2	O
is	O
a	O
2002	O
update	O
of	O
the	O
original	O
Catch	B-Application
the	I-Application
Sperm	I-Application
game	O
.	O
</s>
<s>
The	O
Carnival	O
edition	O
of	O
Catch	B-Application
the	I-Application
Sperm	I-Application
is	O
set	O
against	O
a	O
background	O
of	O
what	O
appears	O
to	O
be	O
surreal	O
paintings	O
and	O
includes	O
drifting	O
balloons	O
and	O
floating	O
strands	O
of	O
confetti	O
,	O
some	O
of	O
which	O
are	O
spiral	O
shaped	O
like	O
uncoiling	O
DNA	O
double	O
helixes	O
.	O
</s>
<s>
The	O
Summer	O
edition	O
of	O
Catch	B-Application
the	I-Application
Sperm	I-Application
is	O
set	O
in	O
a	O
sunny	O
Caribbean	O
ocean	O
of	O
light	O
blue	O
water	O
,	O
flowering	O
underwater	O
plants	O
,	O
and	O
bright	O
sunshine	O
.	O
</s>
<s>
The	O
characters	O
are	O
a	O
Submarine	O
,	O
an	O
Orca	B-Application
,	O
a	O
Swimmer	O
,	O
a	O
Water	O
,	O
and	O
a	O
Diver	O
Sperm	O
.	O
</s>
<s>
The	O
Christmas	O
edition	O
of	O
Catch	B-Application
the	I-Application
Sperm	I-Application
is	O
a	O
winter	O
landscape	O
over	O
which	O
the	O
sperm	O
characters	O
fly	O
rather	O
than	O
swim	O
.	O
</s>
<s>
Catch	B-Application
the	I-Application
Sperm	I-Application
is	O
available	O
in	O
many	O
foreign	O
language	O
editions	O
,	O
including	O
English	O
,	O
German	O
,	O
and	O
Japanese	O
.	O
</s>
<s>
If	O
the	O
condoms	O
find	O
their	O
targets	O
,	O
they	O
snare	O
sperm	O
cells	O
and	O
the	O
AIDS	B-Device
virus	O
.	O
</s>
<s>
At	O
some	O
point	O
during	O
play	O
,	O
the	O
AIDS	B-Device
virus	O
mutates	O
,	O
and	O
play	O
speeds	O
up	O
rapidly	O
.	O
</s>
<s>
The	O
world	O
's	O
top	O
three	O
players	O
of	O
the	O
week	O
receive	O
a	O
Catch	B-Application
the	I-Application
Sperm	I-Application
mouse	O
pad	O
inside	O
of	O
which	O
mock	O
sperm	O
swim	O
in	O
a	O
liquid	O
.	O
</s>
