<s>
The	B-Operating_System
7th	I-Operating_System
Guest	I-Operating_System
:	I-Operating_System
Infection	I-Operating_System
is	O
a	O
2011	O
abstract	O
strategy	B-Application
mobile	B-Application
game	I-Application
which	O
originally	O
appeared	O
as	O
the	O
microscope	O
puzzle	O
in	O
the	O
1993	O
computer	O
game	O
The	B-Application
7th	I-Application
Guest	I-Application
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
Ataxx	B-Application
family	O
of	O
board	O
games	O
,	O
whose	O
lineage	O
began	O
with	O
a	O
1988	O
computer	O
game	O
called	O
Infection	O
.	O
</s>
<s>
In	O
single-player	O
mode	O
the	O
opponent	O
is	O
the	O
mad	O
genius	O
Henry	O
Stauf	O
,	O
antagonist	O
of	O
The	B-Application
7th	I-Application
Guest	I-Application
,	O
who	O
verbally	O
taunts	O
the	O
player	O
throughout	O
the	O
game	O
.	O
</s>
<s>
The	O
player	O
may	O
choose	O
from	O
seven	O
difficulty	O
levels	O
when	O
playing	O
against	O
the	O
AI	B-Application
.	O
</s>
<s>
Written	O
by	O
Dave	O
Crummack	O
and	O
Craig	O
Galley	O
,	O
Infection	O
was	O
programmed	O
on	O
the	O
Amiga	B-Device
,	O
Commodore	O
64	O
and	O
Atari	B-Device
ST	I-Device
platforms	O
.	O
</s>
<s>
The	O
rights	O
to	O
the	O
game	O
were	O
subsequently	O
sold	O
to	O
the	O
Leland	O
Corporation	O
,	O
who	O
released	O
it	O
as	O
an	O
arcade	O
game	O
under	O
the	O
name	O
Ataxx	B-Application
.	O
</s>
<s>
In	O
1993	O
Trilobyte	O
released	O
The	B-Application
7th	I-Application
Guest	I-Application
,	O
which	O
included	O
a	O
version	O
of	O
the	O
game	O
as	O
the	O
Microscope	O
Puzzle	O
.	O
</s>
<s>
When	O
Trilobyte	O
re-released	O
The	B-Application
7th	I-Application
Guest	I-Application
for	O
iPhone	B-Device
and	O
iPad	B-Device
in	O
2010	O
,	O
they	O
announced	O
that	O
some	O
puzzles	O
,	O
including	O
the	O
Microscope	O
Puzzle	O
,	O
would	O
not	O
be	O
included	O
due	O
to	O
technical	O
challenges	O
associated	O
with	O
adapting	O
the	O
original	O
game	O
to	O
the	O
new	O
platforms	O
.	O
</s>
<s>
An	O
updated	O
version	O
of	O
the	O
Microscope	O
Puzzle	O
was	O
released	O
for	O
iPad	B-Device
as	O
The	B-Operating_System
7th	I-Operating_System
Guest	I-Operating_System
:	I-Operating_System
Infection	I-Operating_System
,	O
featuring	O
updated	O
graphics	O
and	O
gameplay	O
settings	O
in	O
April	O
2011	O
.	O
</s>
