<s>
Space	B-Application
Ace	I-Application
21	I-Application
is	O
a	O
video	O
game	O
published	O
by	O
Synergistic	O
Solar	O
,	O
Inc	O
.	O
</s>
<s>
Space	B-Application
Ace	I-Application
21	I-Application
is	O
a	O
game	O
involving	O
combat	O
between	O
two	O
spaceships	O
,	O
played	O
in	O
either	O
two	O
or	O
three	O
dimensions	O
.	O
</s>
<s>
Ian	O
Chadwick	O
reviewed	O
Space	B-Application
Ace	I-Application
21	I-Application
in	O
Ares	O
Magazine	O
#13	O
and	O
commented	O
that	O
"	O
Space	B-Application
Ace	I-Application
21	I-Application
is	O
highly	O
recommended	O
for	O
the	O
science	O
fiction	O
game	O
buff	O
tired	O
of	O
arcade	O
shootouts	O
and	O
looking	O
for	O
a	O
more	O
realistic	O
bit	O
of	O
fun.	O
"	O
</s>
