<s>
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
is	O
a	O
World	O
War	O
II	O
submarine	O
simulator	O
game	O
developed	O
by	O
Dynamix	O
for	O
MS-DOS	B-Application
in	O
1994	B-Application
.	O
</s>
<s>
The	O
game	O
was	O
re-released	O
by	O
Sierra	O
On-Line	O
for	O
Windows	O
in	O
1995	O
as	O
Command	B-Application
:	I-Application
Aces	I-Application
of	I-Application
the	I-Application
Deep	I-Application
.	O
</s>
<s>
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
was	O
the	O
last	O
installment	O
of	O
Dynamix	O
's	O
Aces	O
series	O
,	O
which	O
included	O
the	O
flight	B-Application
simulators	I-Application
Red	B-Device
Baron	I-Device
,	O
Aces	B-Application
of	I-Application
the	I-Application
Pacific	I-Application
,	O
and	O
Aces	O
Over	O
Europe	O
.	O
</s>
<s>
However	O
,	O
unlike	O
its	O
predecessors	O
,	O
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
simulates	O
a	O
Kriegsmarine	O
U-boat	B-Operating_System
during	O
World	O
War	O
II	O
.	O
</s>
<s>
A	O
unique	O
feature	O
was	O
that	O
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
came	O
with	O
a	O
realistic	O
Kriegsmarine	O
War	O
Grid	O
map	O
in	O
which	O
the	O
player	O
used	O
in	O
reference	O
to	O
finding	O
their	O
patrol	O
zones	O
.	O
</s>
<s>
There	O
is	O
also	O
an	O
extensive	O
in-game	O
manual	O
that	O
covers	O
the	O
development	O
of	O
the	O
U-boat	B-Operating_System
,	O
time-line	O
based	O
maps	O
that	O
show	O
kill-to-loss	O
ratios	O
,	O
and	O
,	O
on	O
the	O
CD-ROM	B-Device
version	O
,	O
video	O
interviews	O
with	O
former	O
German	O
U-boat	B-Operating_System
captains	O
.	O
</s>
<s>
The	O
game	O
includes	O
single	O
mission	O
mode	O
,	O
where	O
the	O
player	O
can	O
choose	O
to	O
attack	O
a	O
convoy	B-Application
,	O
a	O
taskforce	O
of	O
warships	O
(	O
consisting	O
of	O
cruisers	O
and/or	O
battleships	O
)	O
,	O
or	O
a	O
carrier	O
task-force	O
in	O
a	O
variety	O
of	O
conditions	O
.	O
</s>
<s>
There	O
are	O
also	O
several	O
historical	O
missions	O
where	O
the	O
player	O
can	O
replay	O
the	O
role	O
of	O
some	O
of	O
Germany	O
's	O
greatest	O
U-boat	B-Operating_System
captains	O
.	O
</s>
<s>
Alongside	O
the	O
single	O
missions	O
,	O
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
includes	O
a	O
single	O
player	O
Career	O
Mode	O
where	O
the	O
player	O
can	O
choose	O
which	O
year	O
of	O
the	O
war	O
he	O
wants	O
to	O
start	O
his	O
career	O
,	O
up	O
until	O
the	O
end	O
of	O
the	O
war	O
.	O
</s>
<s>
Within	O
the	O
Career	O
Mode	O
the	O
player	O
can	O
receive	O
promotions	O
,	O
medals	O
,	O
and	O
opportunities	O
to	O
take	O
command	O
of	O
newer	O
U-boats	B-Operating_System
.	O
</s>
<s>
There	O
are	O
three	O
models	O
of	O
U-boats	B-Operating_System
in	O
several	O
variations	O
for	O
the	O
player	O
to	O
choose	O
from	O
,	O
each	O
of	O
which	O
becomes	O
available	O
during	O
its	O
historical	O
period	O
.	O
</s>
<s>
Command	B-Application
:	I-Application
Aces	I-Application
of	I-Application
the	I-Application
Deep	I-Application
updated	O
the	O
graphics	O
to	O
a	O
higher	O
resolution	O
.	O
</s>
<s>
This	O
re-release	O
also	O
integrated	O
an	O
expansion	O
that	O
brought	O
in	O
the	O
Type	O
XXI	O
and	O
Type	O
XXIII	O
U-boats	B-Operating_System
.	O
</s>
<s>
An	O
expansion	O
package	O
for	O
either	O
the	O
floppy	O
or	O
CD	O
versions	O
of	O
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
adds	O
brand	O
new	O
missions	O
,	O
areas	O
and	O
a	O
special	O
prototype	O
XXI	O
U-boat	B-Operating_System
submarine	O
.	O
</s>
<s>
Most	O
amazing	O
is	O
the	O
prototype	O
Type	O
XXI	O
U-boat	B-Operating_System
,	O
which	O
includes	O
sonar	O
and	O
radar	O
abilities	O
as	O
well	O
as	O
two	O
kinds	O
of	O
torpedo	O
types	O
for	O
its	O
exclusive	O
use	O
.	O
</s>
<s>
In	O
1995	O
,	O
there	O
also	O
was	O
an	O
updated	O
Windows	O
version	O
released	O
on	O
CD-ROM	B-Device
called	O
Command	B-Application
:	I-Application
Aces	I-Application
of	I-Application
the	I-Application
Deep	I-Application
.	O
</s>
<s>
In	O
1996	O
Computer	O
Gaming	O
World	O
ranked	O
Aces	B-Application
of	I-Application
the	I-Application
Deep	I-Application
as	O
the	O
71st	O
best	O
game	O
of	O
all	O
time	O
,	O
calling	O
it	O
"	O
still	O
unrivaled	O
for	O
creating	O
an	O
authentic	O
atmosphere.	O
"	O
</s>
