<s>
Zeit²	B-Application
(	O
also	O
known	O
as	O
Zeit	O
Squared	O
)	O
is	O
a	O
scrolling	O
shooter	O
shoot	O
'	O
em	O
up	O
made	O
by	O
German	O
developer	O
Brightside	O
Games	O
,	O
which	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
on	O
January	O
12	O
,	O
2011	O
.	O
</s>
<s>
Zeit²	B-Application
is	O
a	O
traditional	O
side-scrolling	O
,	O
2D	O
,	O
shoot	O
'	O
em	O
up	O
game	O
with	O
a	O
unique	O
gameplay	O
mechanic	O
that	O
allows	O
players	O
to	O
move	O
forward	O
and	O
backward	O
in	O
time	O
,	O
making	O
it	O
possible	O
for	O
the	O
player	O
to	O
combine	O
shots	O
and	O
power	O
,	O
and	O
even	O
be	O
assisted	O
by	O
a	O
shadow	O
version	O
of	O
the	O
player	O
.	O
</s>
<s>
Zeit²	B-Application
was	O
within	O
the	O
Top	O
20	O
of	O
Microsoft	O
Dream	O
Build	O
Play	O
2008	O
,	O
an	O
Independent	O
Games	O
Festival	O
2009	O
Student	O
Showcase	O
Finalist	O
and	O
Indie	O
Game	O
Challenge	O
2010	O
Finalist	O
.	O
</s>
<s>
Zeit²	B-Application
received	O
"	O
average	O
"	O
reviews	O
on	O
both	O
platforms	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
