<s>
Danger	B-Application
from	I-Application
the	I-Application
Deep	I-Application
,	O
often	O
abbreviated	O
as	O
DftD	O
,	O
is	O
an	O
open-source	B-Application
World	O
War	O
II	O
German	O
U-boat	O
simulation	O
for	O
PC	B-Device
,	O
striving	O
for	O
technical	O
and	O
historical	O
accuracy	O
.	O
</s>
<s>
The	O
project	O
was	O
registered	O
in	O
2003	O
on	O
sourceforge.net	B-Application
and	O
is	O
since	O
then	O
developed	O
as	O
open	B-Application
source	I-Application
software	I-Application
under	O
the	O
GPLv2	O
.	O
</s>
<s>
The	O
game	O
targets	O
Multi-platform	B-Operating_System
,	O
supporting	O
FreeBSD	B-Operating_System
,	O
OpenBSD	B-Operating_System
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
Linux	B-Application
distributions	I-Application
,	O
and	O
Microsoft	B-Application
Windows	I-Application
by	O
utilizing	O
SDL	B-Operating_System
and	O
OpenGL	B-Application
.	O
</s>
<s>
Hardware	O
addressed	O
is	O
OpenGL	B-Application
1.5	O
(	O
while	O
recommending	O
"	O
OpenGL	B-Application
2.0	O
or	O
greater	O
"	O
)	O
with	O
around	O
256MB	O
of	O
RAM	B-Architecture
,	O
1GHz	O
processor	O
and	O
common	O
PC	B-Device
input	O
devices	O
(	O
keyboard	O
,	O
mouse	O
)	O
.	O
</s>
<s>
As	O
of	O
June	O
11	O
2020	O
the	O
latest	O
commit	O
to	O
the	O
Git	B-Application
repo	O
was	O
May	O
10	O
,	O
2020	O
.	O
</s>
<s>
A	O
Linux	B-Application
Journal	O
review	O
from	O
2010	O
received	O
DftD	O
quite	O
positive	O
.	O
</s>
<s>
In	O
2004	O
The	O
Wargamer	O
recommended	O
the	O
game	O
to	O
"	O
serious	O
sim	O
gamers	O
"	O
which	O
should	O
"	O
head	O
over	O
to	O
Danger	B-Application
from	I-Application
the	I-Application
Deep	I-Application
's	O
official	O
web	O
site	O
and	O
take	O
a	O
look.	O
"	O
.	O
</s>
<s>
In	O
2011	O
an	O
Ars	O
Technica	O
article	O
on	O
the	O
history	O
of	O
simulation	O
games	O
noted	O
Danger	B-Application
from	I-Application
the	I-Application
Deep	I-Application
as	O
:	O
"	O
These	O
days	O
,	O
submarine	O
sims	O
 [ ... ] 	O
are	O
kept	O
alive	O
by	O
the	O
open-source	B-Application
Danger	B-Application
from	I-Application
the	I-Application
Deep	I-Application
"	O
.	O
</s>
<s>
The	O
game	O
was	O
downloaded	O
between	O
2003	O
and	O
April	O
2017	O
1.3	O
million	O
times	O
alone	O
from	O
SourceForge	B-Application
,	O
chip.de	O
counted	O
another	O
100,000	O
downloads	O
.	O
</s>
