<s>
Enigma	B-Application
is	O
a	O
puzzle	O
video	O
game	O
based	O
on	O
Oxyd	B-Application
,	O
and	O
is	O
released	O
under	O
the	O
GNU	B-License
GPL-2.0-or-later	I-License
.	O
</s>
<s>
Enigma	B-Application
continues	O
to	O
be	O
very	O
popular	O
as	O
an	O
open	B-Application
source	I-Application
multi-platform	B-Operating_System
derivative	O
of	O
Oxyd	B-Application
now	O
that	O
Oxyd	B-Application
is	O
no	O
longer	O
maintained	O
.	O
</s>
<s>
The	O
open	B-Application
source	I-Application
fangame	B-Application
Enigma	B-Application
has	O
been	O
praised	O
in	O
reviews	O
.	O
</s>
<s>
Enigma	B-Application
is	O
a	O
marble	O
game	O
.	O
</s>
<s>
Landscapes	O
usually	O
take	O
the	O
form	O
of	O
logic	O
puzzles	O
,	O
although	O
frequently	O
,	O
dexterity	O
with	O
the	O
pointing	B-Device
device	I-Device
(	O
the	O
only	O
form	O
of	O
input	O
)	O
is	O
also	O
required	O
.	O
</s>
<s>
Enigma	B-Application
is	O
cross-platform	B-Operating_System
and	O
available	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
GP2X	B-Device
,	O
Microsoft	B-Application
Windows	I-Application
,	O
FreeBSD	B-Operating_System
and	O
Linux	B-Application
(	O
with	O
packages	O
available	O
for	O
several	O
distributions	B-Application
)	O
.	O
</s>
<s>
Enigma	B-Application
consists	O
of	O
approximately	O
2500	O
levels	O
,	O
known	O
as	O
‘	O
landscapes’	O
,	O
which	O
may	O
be	O
played	O
in	O
any	O
order	O
.	O
</s>
<s>
The	O
player	O
controls	O
one	O
or	O
more	O
marbles	O
using	O
the	O
mouse	B-Device
,	O
and	O
interacts	O
with	O
the	O
landscape	O
purely	O
through	O
the	O
marble	O
.	O
</s>
<s>
Levels	O
fall	O
into	O
two	O
broad	O
categories	O
:	O
Oxyd	B-Application
landscapes	O
and	O
Meditation	O
landscapes	O
.	O
</s>
<s>
The	O
level	O
automatically	O
restarts	O
from	O
the	O
beginning	O
when	O
all	O
lives	O
are	O
lost	O
,	O
with	O
the	O
Oxyd	B-Application
colours	O
randomly	O
shuffled	O
again	O
.	O
</s>
<s>
Enigma	B-Application
also	O
contains	O
a	O
score	O
system	O
which	O
tracks	O
how	O
fast	O
the	O
player	O
finishes	O
the	O
level	O
.	O
</s>
<s>
Score	O
statistics	O
are	O
published	O
every	O
month	O
at	O
the	O
official	O
website	O
of	O
Enigma	B-Application
.	O
</s>
<s>
Since	O
2002	O
,	O
Oxyd	B-Application
is	O
abandonware	O
.	O
</s>
<s>
That	O
same	O
year	O
2002	O
was	O
the	O
initial	O
release	O
of	O
Enigma	B-Application
.	O
</s>
<s>
In	O
2007	O
,	O
Enigma	B-Application
reached	O
stable	O
version	O
1.01	O
.	O
</s>
<s>
The	O
landscapes	O
are	O
generated	O
by	O
scripts	O
in	O
the	O
Lua	B-Language
programming	I-Language
language	I-Language
,	O
making	O
the	O
creation	O
of	O
complicated	O
landscapes	O
relatively	O
easy	O
.	O
</s>
<s>
Enigma	B-Application
does	O
not	O
currently	O
support	O
the	O
popular	O
cooperative	O
two-player	O
network	O
games	O
that	O
were	O
available	O
with	O
some	O
versions	O
of	O
Oxyd	B-Application
.	O
</s>
<s>
Enigma	B-Application
has	O
been	O
praised	O
in	O
reviews	O
as	O
open	B-Application
source	I-Application
fan	B-Application
game	I-Application
and	O
clone	O
of	O
Oxyd	B-Application
.	O
</s>
<s>
Enigma	B-Application
was	O
selected	O
by	O
Linux	B-Application
Format	O
as	O
"	O
HotPick	O
"	O
in	O
February	O
2007	O
.	O
</s>
<s>
It	O
is	O
included	O
in	O
many	O
Linux	B-Application
distributions	I-Application
and	O
is	O
distributed	O
over	O
various	O
freeware	O
outlets	O
.	O
</s>
<s>
Enigma	B-Application
was	O
downloaded	O
alone	O
over	O
SourceForge	B-Application
between	O
2011	O
and	O
May	O
2017	O
over	O
110,000	O
times	O
according	O
to	O
their	O
download	O
statistic	O
,	O
computerbild.de	O
counted	O
another	O
30,000	O
downloads	O
.	O
</s>
<s>
Also	O
several	O
video	O
game	O
magazines	O
 '	O
cover	O
disks	O
included	O
Enigma	B-Application
as	O
part	O
of	O
Freeware	O
and	O
remake	O
collections	O
,	O
for	O
instance	O
GameStar	O
06/2005	O
.	O
</s>
