<s>
Airheart	B-Device
is	O
an	O
action	B-Application
game	I-Application
designed	O
and	O
programmed	O
by	O
Dan	O
Gorlin	O
for	O
the	O
Apple	B-Device
II	I-Device
and	O
published	O
by	O
Broderbund	O
in	O
1986	O
.	O
</s>
<s>
It	O
requires	O
a	O
128K	O
Apple	B-Device
IIe	I-Device
(	O
or	O
later	O
)	O
to	O
run	O
,	O
as	O
it	O
uses	O
the	O
16-color	O
double	O
hi-res	O
graphics	O
mode	O
.	O
</s>
<s>
Gorlin	O
reworked	O
the	O
game	O
as	O
Typhoon	B-Application
Thompson	I-Application
in	I-Application
Search	I-Application
for	I-Application
the	I-Application
Sea	I-Application
Child	I-Application
for	O
the	O
Atari	B-Device
ST	I-Device
(	O
1988	O
)	O
,	O
and	O
later	O
the	O
Amiga	B-Device
(	O
1990	O
)	O
,	O
which	O
is	O
closer	O
to	O
what	O
he	O
originally	O
envisioned	O
.	O
</s>
<s>
The	O
name	O
Airheart	B-Device
is	O
the	O
title	O
the	O
player	O
aspires	O
to	O
earn	O
.	O
</s>
<s>
Gorlin	O
had	O
great	O
success	O
with	O
his	O
first	O
title	O
,	O
Choplifter	B-Application
,	O
which	O
he	O
developed	O
in	O
six	O
months	O
.	O
</s>
<s>
Airheart	B-Device
took	O
about	O
three	O
years	O
to	O
develop	O
.	O
</s>
<s>
This	O
is	O
in	O
large	O
part	O
because	O
he	O
also	O
developed	O
other	O
games	O
which	O
he	O
lost	O
interest	O
in	O
and	O
never	O
completed	O
and	O
also	O
because	O
he	O
did	O
a	O
lot	O
of	O
research	O
and	O
built	O
a	O
number	O
of	O
tools	B-Application
to	O
help	O
in	O
game	O
development	O
.	O
</s>
<s>
The	O
largest	O
version	O
of	O
each	O
sprite	O
was	O
created	O
by	O
hand	O
,	O
then	O
Gorlin	O
used	O
proprietary	O
tools	B-Application
to	O
create	O
the	O
roughly	O
twenty	O
smaller	O
versions	O
.	O
</s>
<s>
Storing	O
these	O
sprites	O
in	O
RAM	B-Architecture
,	O
he	O
was	O
able	O
to	O
simulate	O
scaling	O
in	O
realtime	O
.	O
</s>
