<s>
An	O
iPod	B-Device
click	O
wheel	O
game	O
or	O
iPod	B-Operating_System
game	I-Operating_System
is	O
a	O
video	O
game	O
playable	O
on	O
the	O
various	O
versions	O
of	O
the	O
Apple	O
portable	O
media	O
player	O
,	O
the	B-Device
iPod	I-Device
.	O
</s>
<s>
The	O
original	O
iPod	B-Device
had	O
the	O
game	O
Brick	B-Application
(	O
originally	O
invented	O
by	O
Apple	O
co-founder	O
Steve	O
Wozniak	O
)	O
included	O
as	O
an	O
easter	O
egg	O
hidden	O
feature	O
;	O
later	O
firmware	B-Application
versions	O
added	O
it	O
as	O
a	O
menu	O
option	O
.	O
</s>
<s>
Later	O
revisions	O
of	O
the	B-Device
iPod	I-Device
added	O
three	O
more	O
games	O
in	O
addition	O
to	O
Brick	B-Application
:	O
Parachute	O
,	O
Solitaire	B-Algorithm
,	O
and	O
Music	O
Quiz	O
.	O
</s>
<s>
These	O
games	O
should	O
not	O
be	O
confused	O
with	O
games	O
for	O
the	B-Device
iPod	I-Device
Touch	O
,	O
which	O
require	O
iOS	B-Application
and	O
are	O
only	O
available	O
on	O
Apple	B-Application
's	I-Application
App	I-Application
Store	I-Application
on	O
iTunes	B-Operating_System
.	O
</s>
<s>
On	O
23rd	O
December	O
2005	O
,	O
CoolGorilla	B-Application
,	O
a	O
new	O
start-up	O
,	O
launched	O
a	O
trivia	O
game	O
for	O
the	B-Device
iPod	I-Device
.	O
</s>
<s>
In	O
September	O
2006	O
,	O
the	O
iTunes	B-Operating_System
Store	O
began	O
to	O
offer	O
nine	O
additional	O
games	O
for	O
purchase	O
with	O
the	O
launch	O
of	O
iTunes	B-Operating_System
7	I-Operating_System
,	O
compatible	O
with	O
the	O
fifth-generation	O
iPod	B-Device
with	O
iPod	B-Device
software	I-Device
1.2	O
or	O
later	O
.	O
</s>
<s>
Those	O
games	O
were	O
Bejeweled	B-Device
,	O
Cubis	B-Language
2	I-Language
,	O
Mahjong	B-Application
,	O
Mini	O
Golf	B-Application
,	O
Pac-Man	B-Application
,	O
Tetris	B-Device
,	O
Texas	B-Device
Hold	I-Device
'	I-Device
Em	I-Device
,	O
Vortex	B-Application
,	O
and	O
Zuma	B-Application
.	O
</s>
<s>
These	O
games	O
were	O
made	O
available	O
for	O
purchase	O
from	O
the	O
iTunes	B-Operating_System
Store	O
for	O
US	O
$4.99	O
each	O
.	O
</s>
<s>
In	O
December	O
2006	O
,	O
two	O
more	O
games	O
were	O
released	O
by	O
EA	O
Mobile	O
at	O
the	O
same	O
price	O
:	O
Royal	B-Algorithm
Solitaire	I-Algorithm
and	O
Sudoku	O
.	O
</s>
<s>
In	O
February	O
2007	O
,	O
Ms.	B-Application
Pac-Man	I-Application
was	O
released	O
,	O
followed	O
in	O
April	O
2007	O
by	O
iQuiz	O
.	O
</s>
<s>
In	O
May	O
2007	O
,	O
Apple	O
released	O
Lost	B-Application
:	I-Application
The	I-Application
Video	I-Application
Game	I-Application
by	O
Gameloft	O
,	O
based	O
on	O
the	O
television	O
show	O
.	O
</s>
<s>
In	O
December	O
2007	O
,	O
Apple	O
released	O
a	O
classic	O
Sega	O
game	O
,	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
,	O
which	O
was	O
originally	O
packaged	O
with	O
the	O
Sega	B-Operating_System
Genesis	I-Operating_System
system	O
in	O
the	O
early	O
1990s	O
.	O
</s>
<s>
With	O
third	O
parties	O
like	O
Namco	O
,	O
Square	O
Enix	O
,	O
EA	O
,	O
Sega	O
,	O
and	O
Hudson	O
Soft	O
all	O
making	O
games	O
for	O
the	B-Device
iPod	I-Device
,	O
Apple	O
's	O
dedicated	O
MP3	O
player	O
took	O
great	O
steps	O
towards	O
entering	O
the	O
video	O
game	O
handheld	O
console	O
market	O
.	O
</s>
<s>
The	O
games	O
are	O
in	O
the	O
form	O
of	O
files	O
(	O
iPod	B-Operating_System
game	I-Operating_System
)	O
,	O
which	O
are	O
actually	O
.zip	O
archives	O
in	O
disguise	O
.	O
</s>
<s>
Apple	O
never	O
made	O
a	O
software	B-Application
development	I-Application
kit	I-Application
(	O
SDK	O
)	O
available	O
to	O
the	O
public	O
for	O
iPod-specific	O
development	O
.	O
</s>
<s>
The	O
iOS	B-Operating_System
SDK	I-Operating_System
covers	O
only	O
iOS	B-Application
on	O
the	O
iPhone	B-Device
and	O
iPod	B-Device
Touch	I-Device
,	O
not	O
traditional	O
iPods	B-Device
.	O
</s>
<s>
This	O
is	O
a	O
list	O
of	O
games	O
that	O
were	O
made	O
available	O
for	O
the	O
newest	O
iPods	B-Device
,	O
excluding	O
the	B-Device
iPod	I-Device
Touch	O
.	O
</s>
<s>
These	O
are	O
the	O
games	O
that	O
originally	O
came	O
with	O
an	O
iPod	B-Device
.	O
</s>
<s>
iPod	B-Device
version	O
Titles	O
Publishers	O
iPod	B-Device
1G	O
,	O
2G	O
Brick	B-Application
(	O
also	O
called	O
Game	O
)	O
Apple	O
Inc	O
.	O
iPod	B-Device
3G	O
,	O
4G	O
,	O
5G	O
,	O
and	O
5.5G	O
;	O
iPod	B-Device
Nano	O
1G	O
and	O
2G	O
;	O
iPod	B-Device
Mini	O
Brick	B-Application
,	O
Music	O
Quiz	O
,	O
Parachute	O
,	O
Solitaire	B-Algorithm
Apple	O
Inc	O
.	O
iPod	B-Device
Nano	O
3G	O
;	O
iPod	B-Device
Classic	O
6G	O
iQuiz	O
,	O
Klondike	O
,	O
Vortex	B-Application
Apple	O
Inc	O
.	O
iPod	B-Device
Nano	O
4G	O
and	O
5G	O
Maze	O
,	O
Klondike	O
,	O
Vortex	B-Application
,	O
Brick	B-Application
Apple	O
Inc	O
.	O
</s>
<s>
iTunes	B-Operating_System
had	O
come	O
under	O
much	O
criticism	O
due	O
to	O
the	O
UK	O
price	O
of	O
iPod	B-Operating_System
games	I-Operating_System
,	O
GB	O
£3.99	O
(	O
about	O
US	O
$7.40	O
)	O
.	O
</s>
<s>
Developers	O
had	O
criticized	O
Apple	O
for	O
not	O
creating	O
a	O
software	B-Application
development	I-Application
kit	I-Application
(	O
SDK	O
)	O
for	O
software	O
developers	O
to	O
create	O
new	O
iPod	B-Operating_System
games	I-Operating_System
;	O
this	O
was	O
likely	O
to	O
keep	O
the	O
digital	O
rights	O
management	O
of	O
iPod	B-Operating_System
games	I-Operating_System
closed	O
.	O
</s>
<s>
Despite	O
this	O
,	O
it	O
did	O
not	O
prevent	O
users	O
from	O
running	O
an	O
alternative	O
OS	O
on	O
the	B-Device
iPod	I-Device
such	O
as	O
Linux	O
,	O
whereby	O
,	O
for	O
example	O
,	O
there	O
are	O
ports	O
of	O
Doom	B-Application
that	O
will	O
run	O
on	O
fifth-generation	O
iPods	B-Device
.	O
</s>
<s>
Running	O
Linux	O
on	O
an	O
iPod	B-Device
retains	O
the	O
music-playing	O
functionality	O
of	O
the	O
device	O
while	O
also	O
adding	O
features	O
such	O
as	O
the	O
ability	O
to	O
create	O
voice	O
memos	O
through	O
the	O
headphones	O
.	O
</s>
<s>
When	O
the	B-Device
iPod	I-Device
Classic	O
and	O
iPod	B-Device
Nano	O
third	O
generation	O
were	O
released	O
,	O
games	O
which	O
had	O
previously	O
been	O
purchased	O
could	O
not	O
be	O
synced	O
to	O
the	O
new	O
iPods	B-Device
.	O
</s>
<s>
This	O
is	O
different	O
behavior	O
than	O
applications	O
downloaded	O
on	O
the	O
App	B-Application
Store	I-Application
,	O
which	O
can	O
be	O
downloaded	O
an	O
unlimited	O
number	O
of	O
times	O
.	O
</s>
<s>
These	O
issues	O
were	O
later	O
fixed	O
,	O
however	O
,	O
making	O
it	O
possible	O
to	O
install	O
any	O
single	O
game	O
on	O
any	O
number	O
of	O
iPods	B-Device
registered	O
under	O
the	O
same	O
account	O
.	O
</s>
<s>
Some	O
older	O
iPod	B-Device
units	O
are	O
capable	O
of	O
using	O
replacement	O
firmware	B-Application
such	O
as	O
iPod	B-General_Concept
Linux	I-General_Concept
and	O
Rockbox	B-Application
.	O
</s>
<s>
These	O
firmware	B-Application
projects	O
can	O
play	O
many	O
other	O
games	O
,	O
including	O
the	O
aforementioned	O
native	O
port	O
of	O
Doom	B-Application
;	O
and	O
,	O
via	O
a	O
native	O
port	O
of	O
the	O
Game	B-Device
Boy	I-Device
emulator	B-Application
Gnuboy	O
,	O
many	O
other	O
games	O
could	O
be	O
played	O
,	O
including	O
Super	O
Mario	O
Bros.	O
,	O
Tomb	B-Application
Raider	I-Application
,	O
Mega	B-Application
Man	I-Application
,	O
Kirby	B-Application
,	O
Metroid	B-Device
,	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
,	O
Street	B-Application
Fighter	I-Application
,	O
and	O
hundreds	O
more	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
the	O
third-generation	O
iPod	B-Device
in	O
2003	O
,	O
Apple	O
introduced	O
a	O
″Notes″	O
feature	O
to	O
the	B-Device
iPod	I-Device
's	O
firmware	B-Application
.	O
</s>
<s>
This	O
functionality	O
provided	O
the	O
first	O
opportunity	O
for	O
third-party	O
developers	O
to	O
create	O
simple	O
text	O
and	O
audio	O
games	O
which	O
could	O
be	O
installed	O
and	O
run	O
on	O
an	O
iPod	B-Device
without	O
users	O
needing	O
to	O
replace	O
the	O
official	O
firmware	B-Application
.	O
</s>
<s>
With	O
a	O
limit	O
of	O
1,000	O
individual	O
.txt	O
files	O
,	O
each	O
with	O
a	O
maximum	O
file	O
size	O
of	O
4kb	O
,	O
the	O
Notes	O
feature	O
made	O
use	O
of	O
a	O
limited	O
set	O
of	O
HTML	B-Language
tags	O
.	O
</s>
<s>
The	O
limitation	O
of	O
available	O
html	B-Language
tags	O
meant	O
that	O
developers	O
were	O
restricted	O
to	O
Choose	O
Your	O
Own	O
Adventure	O
–	O
style	O
text-based	O
games	O
or	O
multiple	O
choice	O
–	O
style	O
quizzes	O
with	O
narrated	O
audio	O
.	O
</s>
