<s>
This	O
is	O
a	O
list	O
of	O
Sega	B-Operating_System
Genesis/Mega	I-Operating_System
Drive	I-Operating_System
video	O
games	O
that	O
have	O
sold	O
or	O
shipped	O
at	O
least	O
one	O
million	O
copies	O
,	O
sorted	O
in	O
order	O
of	O
copies	O
sold	O
.	O
</s>
<s>
The	O
best-selling	O
title	O
is	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
,	O
first	O
released	O
in	O
North	O
America	O
on	O
June	O
23	O
,	O
1991	O
.	O
</s>
<s>
The	O
second	O
best-selling	O
game	O
is	O
its	O
sequel	O
,	O
1992	O
's	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
2	I-Application
,	O
with	O
6	O
million	O
copies	O
sold	O
.	O
</s>
<s>
+Sega	O
Genesis/Mega	O
Drive	O
games	O
that	O
have	O
sold	O
or	O
shipped	O
at	O
least	O
one	O
million	O
copies	O
Title	O
Copies	O
soldRegional	O
breakdownRelease	O
date	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
15	O
million	O
(	O
bundled	O
with	O
Genesis/Mega	O
Drive	O
hardware	O
)	O
"	O
Review	O
:	O
Sonic	O
Jam	O
"	O
.	O
</s>
