<s>
tranquility	B-Application
is	O
a	O
nonviolent	O
musical	B-Application
platform	O
game	O
created	O
in	O
1991	O
for	O
Macintosh	B-Device
and	O
Windows	B-Application
computers	I-Application
by	O
musician	O
William	O
A	O
.	O
Romanowski	O
.	O
</s>
<s>
The	O
game	O
features	O
generative	O
algorithms	O
that	O
determine	O
music	B-Application
and	O
level	O
layout	O
based	O
on	O
the	O
player	O
's	O
actions	O
.	O
</s>
<s>
For	O
this	O
reason	O
,	O
and	O
due	O
to	O
its	O
use	O
of	O
generated	O
ambient	O
music	B-Application
,	O
the	O
game	O
's	O
philosophy	O
has	O
been	O
compared	O
to	O
that	O
of	O
Transcendentalism	O
and	O
the	O
New	O
Age	O
Movement	O
.	O
</s>
<s>
Although	O
the	O
game	O
is	O
still	O
capable	O
of	O
playing	O
local	O
demo	O
levels	O
,	O
starting	O
with	O
macOS	B-Application
Catalina	O
,	O
32-bit	O
apps	O
were	O
no	O
longer	O
compatible	O
with	O
macOS	B-Application
.	O
</s>
<s>
Detailed	O
information	O
about	O
Tranquility	B-Application
and	O
its	O
history	O
were	O
published	O
by	O
William	O
A	O
.	O
Romanowski	O
in	O
a	O
2007	O
pitch	O
for	O
social	O
funding	O
.	O
</s>
<s>
In	O
tranquility	B-Application
,	O
the	O
player	O
(	O
from	O
an	O
abstract	O
,	O
first-person	O
viewpoint	O
)	O
floats	O
in	O
a	O
sea	O
of	O
starlit	O
geometric	O
structures	O
called	O
"	O
platforms	O
"	O
in	O
order	O
to	O
pass	O
through	O
targets	O
called	O
"	O
spinners	O
"	O
(	O
camouflaged	O
star-shaped	O
objects	O
scattered	O
at	O
a	O
density	O
of	O
one	O
per	O
room	O
)	O
.	O
</s>
<s>
The	O
essential	O
elements	O
that	O
define	O
a	O
tranquility	B-Application
room	O
are	O
:	O
</s>
<s>
Designed	O
by	O
musician	O
William	O
A	O
.	O
Romanowski	O
,	O
the	O
musical	B-Application
aspects	O
of	O
the	O
game	O
are	O
notable	O
in	O
that	O
they	O
are	O
generated	O
using	O
algorithms	O
designed	O
to	O
respond	O
to	O
the	O
player	O
's	O
interactions	O
with	O
the	O
interface	O
.	O
</s>
<s>
The	O
game	O
's	O
AI	O
algorithms	O
were	O
initially	O
developed	O
using	O
the	O
Nord	O
Modular	O
Synthesizer	O
,	O
with	O
those	O
concepts	O
applied	O
to	O
the	O
game	O
's	O
music	B-Application
and	O
graphics	O
generation	O
systems	O
.	O
</s>
<s>
The	O
music	B-Application
engine	O
creates	O
unique	O
,	O
arrhythmic	O
musical	B-Application
compositions	O
for	O
each	O
player	O
's	O
levels	O
,	O
providing	O
an	O
immersive	O
,	O
sensual	O
environment	O
.	O
</s>
<s>
In	O
this	O
way	O
the	O
game	O
can	O
be	O
compared	O
to	O
generative	O
music	B-Application
games	I-Application
Rez	B-Application
,	O
and	O
Otocky	B-Device
.	O
</s>
<s>
In	O
addition	O
to	O
normal	O
play	O
modes	O
,	O
tranquility	B-Application
includes	O
a	O
simple	O
level	O
editor	O
and	O
a	O
jukebox	O
mode	O
for	O
enjoying	O
the	O
game	O
's	O
generated	O
music	B-Application
.	O
</s>
<s>
The	O
structure	O
of	O
the	O
rooms	O
in	O
tranquility	B-Application
also	O
react	O
to	O
the	O
player	O
's	O
style	O
of	O
level-completion	O
evolutionarily	O
.	O
</s>
<s>
As	O
such	O
,	O
the	O
game	O
allows	O
self-adjusting	O
ad	O
hoc	O
difficulty	O
similar	O
to	O
enemy	O
progression	O
in	O
the	O
space	O
shooter	O
,	O
Warning	B-Application
Forever	I-Application
.	O
</s>
<s>
The	O
generative	O
nature	O
of	O
the	O
musical	B-Application
score	O
as	O
well	O
as	O
the	O
room	O
structure	O
mean	O
that	O
the	O
game	O
will	O
provide	O
a	O
gaming	O
experience	O
uniquely	O
tailored	O
to	O
the	O
strengths	O
and	O
weaknesses	O
of	O
the	O
individual	O
player	O
,	O
and	O
different	O
experiences	O
can	O
be	O
gained	O
by	O
altering	O
playing	O
style	O
.	O
</s>
<s>
This	O
interactive	O
variability	O
directly	O
counteracts	O
the	O
degree	O
of	O
tedium	O
normally	O
associated	O
with	O
progression	O
through	O
3,087	O
rooms	O
,	O
while	O
also	O
relieving	O
the	O
developer	O
from	O
the	O
task	O
of	O
creating	O
thousands	O
of	O
levels	O
manually	O
,	O
an	O
approach	O
also	O
used	O
in	O
No	B-Application
Man	I-Application
's	I-Application
Sky	I-Application
years	O
later	O
.	O
</s>
