<s>
The	O
first	O
game	O
,	O
BoxBoy	O
!,	O
released	O
on	O
January	O
14	O
,	O
2015	O
,	O
in	O
Japan	O
on	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
.	O
</s>
<s>
Its	O
sequel	O
,	O
BoxBoxBoy	O
!,	O
was	O
released	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
in	O
2016	O
,	O
with	O
a	O
third	O
game	O
,	O
Bye-Bye	O
BoxBoy	O
!,	O
in	O
2017	O
.	O
</s>
<s>
A	O
fourth	O
installment	O
,	O
BoxBoy	B-Application
!	I-Application
</s>
<s>
+	O
BoxGirl	O
!,	O
was	O
released	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
in	O
April	O
2019	O
.	O
</s>
<s>
BoxBoy	B-Application
!	I-Application
</s>
<s>
It	O
was	O
a	O
small	O
experimental	O
project	O
in	O
development	O
while	O
the	O
studio	O
was	O
working	O
on	O
Kirby	B-Device
:	I-Device
Triple	I-Device
Deluxe	I-Device
and	O
Kirby	B-Application
and	I-Application
the	I-Application
Rainbow	I-Application
Curse	I-Application
.	O
</s>
<s>
The	O
project	O
plan	O
for	O
BoxBoy	B-Application
!	I-Application
</s>
<s>
is	O
a	O
puzzle-platform	O
game	O
developed	O
by	O
HAL	O
Laboratory	O
and	O
published	O
by	O
Nintendo	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
handheld	B-Application
game	I-Application
console	I-Application
.	O
</s>
<s>
Bye-Bye	B-Device
BoxBoy	I-Device
!	I-Device
</s>
<s>
is	O
a	O
puzzle-platform	O
game	O
developed	O
by	O
HAL	O
Laboratory	O
and	O
published	O
by	O
Nintendo	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
handheld	B-Application
console	I-Application
.	O
</s>
<s>
It	O
is	O
the	O
fourth	O
game	O
in	O
the	O
BoxBoy	B-Application
!	I-Application
</s>
<s>
series	O
and	O
first	O
to	O
be	O
released	O
on	O
the	O
Nintendo	B-Application
Switch	I-Application
.	O
</s>
<s>
BoxBoy	B-Application
!	I-Application
</s>
<s>
The	O
game	O
was	O
released	O
worldwide	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
exclusively	O
via	O
Nintendo	B-Application
eShop	I-Application
on	O
April	O
26	O
,	O
2019	O
.	O
</s>
<s>
The	O
BoxBoy	B-Application
!	I-Application
</s>
