<s>
Keepsake	B-Application
is	O
a	O
third	O
person	O
point-and-click	O
adventure	O
game	O
developed	O
by	O
Canadian	O
company	O
Wicked	O
Studios	O
for	O
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Windows	B-Application
platforms	O
.	O
</s>
<s>
Keepsake	B-Application
is	O
a	O
third	O
person	O
point-and-click	O
adventure	O
game	O
in	O
which	O
the	O
user	O
clicks	O
areas	O
on	O
the	O
screen	O
to	O
navigate	O
and	O
explore	O
the	O
world	O
.	O
</s>
<s>
The	O
engine	O
behind	O
Keepsake	B-Application
is	O
called	O
Glyph	O
.	O
</s>
<s>
The	O
game	O
3D	O
engine	O
is	O
Crystal	B-Language
Space	I-Language
;	O
it	O
works	O
on	O
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Windows	B-Application
.	O
</s>
<s>
The	O
sound	O
engine	O
uses	O
DirectSound3D	O
,	O
but	O
it	O
can	O
also	O
support	O
OpenAL	B-Application
for	O
cross-platform	O
.	O
</s>
