<s>
Glider	B-Application
is	O
a	O
Macintosh	B-Device
video	O
game	O
written	O
by	O
John	O
Calhoun	O
and	O
first	O
published	O
as	O
shareware	B-License
in	O
1988	O
under	O
the	O
company	O
name	O
Soft	O
Dorothy	O
Software	O
.	O
</s>
<s>
The	O
object	O
of	O
the	O
game	O
is	O
to	O
fly	O
a	O
paper	B-Device
plane	I-Device
through	O
the	O
rooms	O
of	O
a	O
house	O
.	O
</s>
<s>
In	O
1991	O
,	O
a	O
colorized	O
version	O
of	O
Glider	B-Application
that	O
included	O
a	O
level	O
editor	O
was	O
published	O
by	O
Casady	O
&	O
Greene	O
as	O
Glider	B-Application
4.0	O
.	O
</s>
<s>
A	O
version	O
of	O
Glider	B-Application
4	O
for	O
Microsoft	B-Application
Windows	I-Application
was	O
released	O
around	O
1994	O
.	O
</s>
<s>
In	O
1994	O
,	O
Casady	O
&	O
Greene	O
published	O
a	O
further	O
enhanced	O
version	O
of	O
the	O
game	O
,	O
Glider	B-Application
PRO	I-Application
,	O
for	O
the	O
Mac	O
.	O
</s>
<s>
Calhoun	O
wrote	O
several	O
other	O
Macintosh	B-Device
games	O
,	O
such	O
as	O
Glypha	O
,	O
Pararena	O
,	O
and	O
Stella	O
Obscura	O
,	O
but	O
Glider	B-Application
was	O
the	O
most	O
popular	O
.	O
</s>
<s>
Collision	O
with	O
"	O
enemy	O
"	O
paper	B-Device
planes	I-Device
and	O
balloons	O
is	O
also	O
fatal	O
,	O
but	O
these	O
can	O
be	O
shot	O
down	O
with	O
the	O
use	O
of	O
a	O
bonus	O
item	O
:	O
rubber	O
bands	O
.	O
</s>
<s>
Glider	B-Application
PRO	I-Application
includes	O
two	O
new	O
bonus	O
items	O
:	O
aluminum	O
foil	O
(	O
shielding	O
against	O
in-flight	O
collisions	O
)	O
and	O
helium	O
tanks	O
(	O
mutually	O
exclusive	O
with	O
regard	O
to	O
batteries	O
,	O
allows	O
the	O
glider	B-Application
to	O
float	O
upwards	O
)	O
.	O
</s>
<s>
Glider	B-Application
4.0	O
was	O
designed	O
around	O
rooms	O
inside	O
a	O
house	O
and	O
the	O
game	O
's	O
theme	O
included	O
such	O
elements	O
as	O
claustrophobia	O
and	O
stormy	O
weather	O
.	O
</s>
<s>
Glider	B-Application
PRO	I-Application
incorporated	O
outdoor	O
environments	O
in	O
addition	O
to	O
indoor	O
environments	O
,	O
and	O
had	O
a	O
different	O
theme	O
which	O
included	O
such	O
things	O
as	O
sunny	O
weather	O
and	O
the	O
start	O
of	O
summer	O
vacation	O
.	O
</s>
<s>
Levels	O
are	O
called	O
"	O
houses	O
"	O
in	O
Glider	B-Application
parlance	O
,	O
though	O
a	O
level	O
may	O
contain	O
any	O
number	O
of	O
individual	O
buildings	O
,	O
as	O
well	O
as	O
outdoors	O
,	O
sewer	O
,	O
or	O
other	O
sections	O
.	O
</s>
<s>
Glider	B-Application
PRO	I-Application
was	O
released	O
with	O
one	O
real	O
house	O
called	O
Slumberland	O
,	O
and	O
one	O
demonstration	O
house	O
.	O
</s>
<s>
Houses	O
can	O
be	O
created	O
and	O
edited	O
using	O
the	O
built-in	O
house	O
editor	O
in	O
the	O
"	O
Classic	O
"	O
version	O
of	O
Glider	B-Application
PRO	I-Application
.	O
</s>
<s>
A	O
separate	O
program	O
for	O
creating	O
and	O
editing	O
houses	O
was	O
included	O
with	O
Glider	B-Application
4.0	O
.	O
</s>
<s>
Inside	B-Application
Mac	I-Application
Games	I-Application
praised	O
Glider	B-Application
PRO	I-Application
for	O
its	O
entertaining	O
and	O
non-violent	O
gameplay	O
,	O
in	O
addition	O
to	O
having	O
a	O
two-player	O
mode	O
that	O
did	O
not	O
require	O
modems	O
or	O
a	O
network	O
.	O
</s>
<s>
Two	O
monthly	O
ezines	O
,	O
GliderTech	O
and	O
The	O
Cockpit	O
were	O
published	O
between	O
1995	O
and	O
1997	O
following	O
the	O
release	O
of	O
Glider	B-Application
PRO	I-Application
.	O
</s>
<s>
In	O
2006	O
,	O
Mark	O
Arenz	O
teamed	O
up	O
with	O
Calhoun	O
to	O
construct	O
a	O
version	O
of	O
Glider	B-Application
PRO	I-Application
built	O
in	O
Adobe	B-Operating_System
Flash	I-Operating_System
.	O
</s>
<s>
On	O
20	O
June	O
2014	O
,	O
a	O
version	O
of	O
Glider	B-Application
for	O
OS	B-Operating_System
X	I-Operating_System
10.7	O
or	O
later	O
,	O
was	O
released	O
on	O
the	O
Mac	B-Application
App	I-Application
Store	I-Application
.	O
</s>
<s>
This	O
version	O
is	O
also	O
available	O
for	O
the	O
iPhone	O
and	O
iPad	O
as	O
Glider	B-Application
Classic	O
.	O
</s>
<s>
On	O
27	O
Jan	O
2016	O
,	O
the	O
source	O
code	O
,	O
graphics	O
,	O
and	O
sound	O
data	O
for	O
Glider	B-Application
PRO	I-Application
were	O
released	O
on	O
GitHub	B-Application
with	O
the	O
source	O
code	O
being	O
licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
v2	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
source	O
code	O
for	O
Glider	B-Application
4.0	O
was	O
released	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
In	O
2020	O
,	O
a	O
fan	O
created	O
a	O
browser-based	O
version	O
of	O
Glider	B-Application
4.0	O
based	O
on	O
John	O
Calhoun	O
's	O
Pascal	O
source	O
code	O
.	O
</s>
