<s>
Trials	B-Application
HD	I-Application
is	O
an	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
game	O
developed	O
by	O
Ubisoft	O
RedLynx	O
and	O
published	O
by	O
Microsoft	O
Game	O
Studios	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
August	O
12	O
,	O
2009	O
as	O
part	O
of	O
the	O
second	O
annual	O
Xbox	B-Device
Live	I-Device
Summer	I-Device
of	I-Device
Arcade	I-Device
and	O
was	O
later	O
re-released	O
in	O
a	O
retail	O
pack	O
alongside	O
Limbo	B-Application
and	O
'	B-Application
Splosion	I-Application
Man	I-Application
in	O
April	O
2011	O
.	O
</s>
<s>
On	O
September	O
6	O
,	O
2012	O
it	O
was	O
announced	O
that	O
a	O
Microsoft	B-Application
Windows	I-Application
version	O
of	O
Trials	B-Application
HD	I-Application
would	O
be	O
bundled	O
inside	O
a	O
special	O
version	O
of	O
Trials	B-Application
Evolution	I-Application
,	O
dubbed	O
Trials	B-Application
Evolution	I-Application
:	I-Application
Gold	I-Application
Edition	I-Application
—	O
although	O
this	O
version	O
changes	O
the	O
physics	O
of	O
the	O
game	O
.	O
</s>
<s>
On	O
February	O
11	O
,	O
2016	O
,	O
Microsoft	O
added	O
Trials	B-Application
HD	I-Application
as	O
part	O
of	O
its	O
backwards	O
compatibility	O
program	O
for	O
Xbox	B-Device
One	I-Device
.	O
</s>
<s>
In	O
Trials	B-Application
HD	I-Application
the	O
player	O
controls	O
a	O
rider	O
on	O
a	O
physics-based	O
motorcycle	O
from	O
the	O
start	O
of	O
the	O
level	O
to	O
the	O
end	O
while	O
navigating	O
a	O
number	O
of	O
obstacles	O
.	O
</s>
<s>
When	O
connected	O
to	O
Xbox	B-Application
Live	I-Application
,	O
the	O
player	O
can	O
view	O
their	O
performance	O
in	O
relation	O
to	O
players	O
in	O
their	O
friends	O
list	O
.	O
</s>
<s>
Trials	B-Application
HD	I-Application
includes	O
a	O
level	O
editor	O
that	O
allows	O
players	O
to	O
construct	O
their	O
own	O
courses	O
and	O
share	O
them	O
with	O
players	O
in	O
their	O
friends	O
list	O
.	O
</s>
<s>
Trials	B-Application
HD	I-Application
is	O
the	O
second	O
2.5D	O
game	O
in	O
the	O
Trials	B-Application
series	O
,	O
following	O
Trials	B-Application
2	O
:	O
Second	O
Edition	O
.	O
</s>
<s>
The	O
game	O
is	O
based	O
on	O
the	O
popular	O
flash	B-Protocol
games	I-Protocol
from	O
the	O
same	O
series	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
August	O
12	O
,	O
2009	O
as	O
part	O
of	O
the	O
second	O
annual	O
Xbox	B-Device
Live	I-Device
Summer	I-Device
of	I-Device
Arcade	I-Device
.	O
</s>
<s>
Ubisoft	O
RedLynx	O
developed	O
Trials	B-Application
HD	I-Application
using	O
an	O
in-house	O
engine	O
coupled	O
with	O
a	O
modified	O
version	O
of	O
Bullet	B-Application
Physics	I-Application
Library	I-Application
which	O
was	O
optimized	O
to	O
utilize	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
's	O
CPU	O
and	O
vector	O
units	O
.	O
</s>
<s>
Ubisoft	O
RedLynx	O
saw	O
this	O
as	O
a	O
"	O
crucial	O
thing	O
in	O
making	O
Trials	B-Application
such	O
a	O
fun	O
and	O
addictive	O
game	O
"	O
Previous	O
Trials	B-Application
games	O
used	O
a	O
much	O
simpler	O
in-house	O
physics	O
engine	O
,	O
however	O
for	O
Trials	B-Application
HD	I-Application
developers	O
opted	O
to	O
use	O
the	O
Bullet	B-Application
library	O
and	O
devote	O
one	O
of	O
the	O
360	B-Operating_System
's	O
cpu	O
cores	O
entirely	O
to	O
physics	O
.	O
</s>
<s>
Developers	O
also	O
improved	O
on	O
the	O
Trials	B-Application
2	O
engine	O
by	O
adding	O
more	O
advanced	O
lighting	O
and	O
real	O
time	O
soft	O
shadows	O
.	O
</s>
<s>
Levels	O
created	O
for	O
Trials	B-Application
HD	I-Application
were	O
designed	O
using	O
the	O
same	O
in-game	O
level	O
editor	O
that	O
allows	O
players	O
to	O
make	O
user-based	O
content	O
.	O
</s>
<s>
In	O
an	O
interview	O
with	O
Eurogamer	O
,	O
Ubisoft	O
RedLynx	O
's	O
Lead	O
Programmer	O
Sebastian	O
Aaltonen	O
stated	O
that	O
there	O
were	O
no	O
plans	O
to	O
port	O
the	O
game	O
to	O
other	O
platforms	O
,	O
adding	O
"	O
Trials	B-Application
HD	I-Application
technology	O
has	O
been	O
specially	O
designed	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
feature-set.	O
"	O
</s>
<s>
Trials	B-Application
HD	I-Application
was	O
announced	O
June	O
1	O
,	O
2009	O
at	O
a	O
Microsoft	O
luncheon	O
during	O
E3	O
2009	O
.	O
</s>
<s>
It	O
was	O
released	O
August	O
12	O
,	O
2009	O
as	O
part	O
of	O
the	O
Xbox	B-Device
Live	I-Device
Summer	I-Device
of	I-Device
Arcade	I-Device
.	O
</s>
<s>
On	O
December	O
23	O
,	O
2009	O
the	O
first	O
downloadable	B-Protocol
content	I-Protocol
,	O
known	O
as	O
the	O
Trials	B-Application
HD	I-Application
Big	O
Pack	O
,	O
was	O
released	O
.	O
</s>
<s>
A	O
second	O
downloadable	B-Protocol
content	I-Protocol
pack	O
was	O
announced	O
for	O
the	O
game	O
in	O
July	O
2010	O
.	O
</s>
<s>
The	O
Trials	B-Application
HD	I-Application
Big	O
Thrills	O
Pack	O
features	O
forty	O
new	O
courses	O
made	O
by	O
RedLynx	O
,	O
but	O
unlike	O
the	O
Trials	B-Application
HD	I-Application
Big	O
Pack	O
it	O
also	O
features	O
ten	O
user	O
created	O
courses	O
.	O
</s>
<s>
Trials	B-Application
HD	I-Application
received	O
"	O
favorable	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
On	O
September	O
14	O
,	O
2010	O
Ubisoft	O
RedLynx	O
announced	O
that	O
Trials	B-Application
HD	I-Application
had	O
surpassed	O
1.3million	O
units	O
in	O
sales	O
.	O
</s>
<s>
Sales	O
of	O
the	O
first	O
downloadable	B-Protocol
content	I-Protocol
pack	O
had	O
also	O
exceeded	O
360	B-Operating_System
thousand	O
,	O
with	O
the	O
second	O
pack	O
selling	O
over	O
90	O
thousand	O
units	O
.	O
</s>
<s>
In	O
2009	O
,	O
Trials	B-Application
HD	I-Application
received	O
two	O
awards	O
voted	O
on	O
by	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
community	O
,	O
Best	O
Overall	O
Arcade	O
Game	O
and	O
Best	O
Innovation	O
.	O
</s>
<s>
In	O
a	O
September	O
2010	O
ranking	O
,	O
IGN	O
listed	O
Trials	B-Application
HD	I-Application
sixteenth	O
in	O
their	O
top	O
twenty-five	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
titles	O
of	O
all	O
time	O
.	O
</s>
<s>
It	O
was	O
also	O
awarded	O
a	O
perfect	O
score	O
by	O
Xbox	B-Operating_System
World	O
360	B-Operating_System
.	O
</s>
<s>
IGN	O
's	O
Daemon	O
Hatfield	O
remarked	O
that	O
Trials	B-Application
HD	I-Application
had	O
"	O
truckloads	O
of	O
content	O
"	O
adding	O
that	O
the	O
game	O
's	O
features	O
"	O
really	O
take	O
advantage	O
of	O
what	O
can	O
be	O
done	O
with	O
Xbox	O
Live.	O
"	O
</s>
<s>
One	O
of	O
the	O
primary	O
criticisms	O
given	O
by	O
critics	O
was	O
Trials	B-Application
HDs	I-Application
steep	O
difficulty	O
curve	O
.	O
</s>
