<s>
Tom	B-Application
Clancy	I-Application
's	I-Application
Ghost	I-Application
Recon	I-Application
2	I-Application
:	I-Application
Summit	I-Application
Strike	I-Application
is	O
the	O
expansion	O
to	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Ghost	I-Application
Recon	I-Application
2	I-Application
.	O
</s>
<s>
There	O
are	O
several	O
minor	O
differences	O
between	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Ghost	I-Application
Recon	I-Application
2	I-Application
:	I-Application
Summit	I-Application
Strike	I-Application
,	O
and	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Ghost	I-Application
Recon	I-Application
2	I-Application
,	O
the	O
most	O
notable	O
being	O
the	O
difficulty	O
,	O
as	O
former	O
being	O
regarded	O
as	O
the	O
harder	O
of	O
the	O
two	O
.	O
</s>
<s>
The	O
game	O
is	O
exclusive	O
to	O
the	O
Xbox	B-Application
.	O
</s>
