<s>
Blocktrix	B-Application
is	O
a	O
free	O
,	O
online	O
,	O
multiplayer	O
,	O
puzzle	O
game	O
based	O
on	O
TetriNET	B-Application
and	O
was	O
created	O
in	O
2000	O
by	O
StrikeLight	O
.	O
</s>
<s>
It	O
was	O
developed	O
as	O
an	O
update	O
to	O
the	O
official	O
TetriNET	B-Application
1.13	O
client	O
after	O
the	O
original	O
creator	O
,	O
St0rmCat	O
,	O
created	O
a	O
new	O
version	O
to	O
the	O
game	O
entitled	O
TetriNET	B-Application
2	O
,	O
which	O
included	O
major	O
changes	O
to	O
the	O
TetriNET	B-Application
client	O
such	O
as	O
not	O
allowing	O
private	O
servers	O
.	O
</s>
<s>
While	O
Blocktrix	B-Application
is	O
compatible	O
with	O
TetriNET	B-Application
servers	O
,	O
the	O
Blocktrix	B-Application
protocol	O
itself	O
adds	O
features	O
to	O
Blocktrix	B-Application
specific	O
servers	O
which	O
makes	O
it	O
a	O
different	O
game	O
altogether	O
.	O
</s>
<s>
The	O
Blocktrix	B-Application
program	O
offers	O
various	O
improvements	O
and	O
fixes	O
over	O
the	O
original	O
TetriNET	B-Application
program	O
.	O
</s>
<s>
Support	O
of	O
Blocktrix	B-Application
,	O
TetriNET	B-Application
,	O
TetriFast	O
,	O
and	O
TSpec	O
modes	O
.	O
</s>
<s>
Enhanced	O
key	O
functions	O
including	O
extended	O
key	O
sensitivity	O
,	O
customizable	O
attack	O
keys	O
,	O
rotation	O
of	O
the	O
preview	O
piece	O
(	O
only	O
available	O
in	O
Blocktrix	B-Application
mode	O
)	O
,	O
and	O
ability	O
to	O
drop	O
blocks	O
in	O
left-most	O
or	O
right-most	O
columns	O
.	O
</s>
<s>
Double-piece	O
preview	O
function	O
(	O
only	O
available	O
in	O
Blocktrix	B-Application
mode	O
)	O
.	O
</s>
<s>
Increased	O
server	B-Application
customization	O
.	O
</s>
<s>
Piece	O
shadow	O
(	O
only	O
available	O
in	O
Blocktrix	B-Application
mode	O
)	O
.	O
</s>
<s>
Three	O
new	O
specials	O
(	O
only	O
available	O
in	O
Blocktrix	B-Application
mode	O
)	O
:	O
</s>
