<s>
is	O
a	O
Mario	B-Application
sports	O
game	O
developed	O
by	O
Camelot	O
Software	O
Planning	O
and	O
published	O
by	O
Nintendo	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
.	O
</s>
<s>
The	O
game	O
was	O
developed	O
by	O
Camelot	O
,	O
the	O
company	O
that	O
produced	O
most	O
of	O
the	O
previous	O
Mario	B-Application
Tennis	I-Application
titles	O
.	O
</s>
<s>
It	O
was	O
later	O
released	O
as	O
a	O
downloadable	O
title	O
on	O
the	O
Nintendo	B-Application
eShop	I-Application
in	O
late	O
2012	O
and	O
Nintendo	O
Selects	O
in	O
2015/2016	O
.	O
</s>
<s>
Like	O
the	O
earlier	O
Mario	B-Application
Tennis	I-Application
titles	O
,	O
Mario	B-Application
Tennis	I-Application
Open	I-Application
incorporates	O
characters	O
,	O
settings	O
,	O
and	O
scenarios	O
from	O
the	O
Mario	B-Application
franchise	I-Application
.	O
</s>
<s>
Players	O
can	O
engage	O
in	O
standard	O
tennis	B-Device
matches	O
but	O
also	O
play	O
special	O
variants	O
with	O
different	O
rules	O
and	O
objectives	O
.	O
</s>
<s>
Mario	B-Application
Tennis	I-Application
Open	I-Application
is	O
also	O
the	O
first	O
Mario	B-Application
Tennis	I-Application
game	O
to	O
feature	O
simultaneous	O
online	O
play.Mario	O
Tennis	O
Open	O
received	O
mixed	O
to	O
positive	O
reviews	O
,	O
gaining	O
aggregate	O
scores	O
of	O
69.54	O
%	O
on	O
GameRankings	O
and	O
69	O
on	O
Metacritic	O
.	O
</s>
<s>
thumb|left|Mario	O
and	O
Yoshi	B-Application
playing	O
against	O
Luigi	O
and	O
Daisy	O
in	O
a	O
doubles	O
match	O
.	O
</s>
<s>
The	O
player	O
can	O
choose	O
to	O
execute	O
different	O
shots	O
using	O
button	B-Device
presses	O
or	O
by	O
selecting	O
them	O
from	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
touchscreen	B-Device
,	O
as	O
shown.Mario	O
Tennis	B-Device
Open	O
features	O
variants	O
of	O
tennis	B-Device
matches	O
,	O
played	O
either	O
in	O
singles	O
or	O
doubles	O
.	O
</s>
<s>
Different	O
shots	O
(	O
lobs	O
,	O
slices	O
,	O
and	O
dropshots	O
)	O
can	O
be	O
executed	O
with	O
different	O
button	B-Device
combinations	O
or	O
by	O
selecting	O
them	O
from	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
touch	B-Device
screen	I-Device
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
player	O
can	O
use	O
the	O
3DS	B-Operating_System
gyroscope	O
to	O
turn	O
the	O
in-game	O
camera	O
by	O
rotating	O
the	O
entire	O
console	O
during	O
gameplay	O
.	O
</s>
<s>
Mario	B-Application
Tennis	I-Application
Open	I-Application
does	O
not	O
feature	O
any	O
RPG	O
elements	O
,	O
unlike	O
the	O
previous	O
handheld	B-Application
games	I-Application
Mario	B-Application
Tennis	I-Application
and	O
Mario	B-Application
Tennis	I-Application
:	O
Power	O
Tour.Mario	O
Tennis	O
Open	O
features	O
twenty-four	O
playable	O
Mario	B-Application
characters	O
,	O
with	O
four	O
being	O
unlocked	O
by	O
accomplishing	O
specific	O
tasks	O
,	O
and	O
eight	O
more	O
being	O
unlocked	O
by	O
scanning	O
certain	O
QR	O
codes	O
.	O
</s>
<s>
Mii	O
characters	O
saved	O
in	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
Mii	O
Maker	O
are	O
also	O
selectable	O
.	O
</s>
<s>
Unlike	O
the	O
Mario	B-Application
characters	O
,	O
Mii	O
characters	O
 '	O
skills	O
vary	O
and	O
are	O
customizable	O
,	O
determined	O
by	O
the	O
tennis	B-Device
gear	O
the	O
player	O
equips	O
.	O
</s>
<s>
However	O
,	O
costumes	O
are	O
obtained	O
by	O
completing	O
certain	O
objectives.Mario	O
Tennis	O
Open	O
supports	O
both	O
online	B-Application
and	O
local	B-Architecture
wireless	I-Architecture
multiplayer	O
,	O
allowing	O
up	O
to	O
four	O
players	O
to	O
play	O
simultaneously	O
on	O
separate	O
Nintendo	B-Operating_System
3DS	I-Operating_System
consoles	O
.	O
</s>
<s>
When	O
a	O
player	O
's	O
Nintendo	B-Operating_System
3DS	I-Operating_System
console	O
comes	O
in	O
contact	O
with	O
another	O
via	O
StreetPass	B-Device
,	O
he	O
will	O
be	O
able	O
to	O
play	O
against	O
a	O
computer-controlled	B-Application
opponent	I-Application
whose	O
play	O
style	O
mimics	O
that	O
of	O
the	O
other	O
player	O
,	O
provided	O
that	O
the	O
other	O
console	O
also	O
contains	O
Mario	B-Application
Tennis	I-Application
Open	I-Application
save	O
data	O
.	O
</s>
<s>
ReceptionMario	O
Tennis	B-Device
Open	O
has	O
received	O
mixed	O
to	O
positive	O
reviews	O
,	O
with	O
aggregate	O
scores	O
of	O
69.26	O
percent	O
on	O
GameRankings	O
and	O
69	O
on	O
Metacritic	O
.	O
</s>
<s>
Nintendo	B-Application
Power	I-Application
scored	O
Mario	O
Tennis	O
Open''	O
7.0	O
out	O
of	O
10	O
in	O
its	O
May	O
2012	O
issue	O
.	O
</s>
