<s>
Opus	B-Application
Magnum	I-Application
is	O
a	O
puzzle-based	O
programming	B-Language
game	I-Language
developed	O
by	O
Zachtronics	O
.	O
</s>
<s>
It	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
and	O
macOS	B-Application
in	O
December	O
2017	O
,	O
following	O
about	O
two	O
months	O
of	O
early	O
access	O
.	O
</s>
<s>
In	O
the	O
game	O
,	O
the	O
player	O
must	O
assemble	O
a	O
series	O
of	O
machines	O
using	O
various	O
tools	O
and	O
program	O
them	O
to	O
complete	O
alchemy-related	O
tasks	O
.	O
</s>
<s>
Opus	B-Application
Magnum	I-Application
is	O
based	O
on	O
The	O
Codex	O
of	O
Alchemical	O
Engineering	O
,	O
one	O
of	O
the	O
earliest	O
Flash	B-Protocol
games	I-Protocol
made	O
by	O
Zach	O
Barth	O
prior	O
to	O
establishing	O
Zachtronics	O
.	O
</s>
<s>
Opus	B-Application
Magnum	I-Application
has	O
the	O
player	O
take	O
the	O
role	O
of	O
an	O
alchemist	B-Language
to	O
create	O
required	O
products	O
by	O
manipulating	O
atoms	O
of	O
base	O
alchemy	B-Language
elements	O
(	O
the	O
classic	O
elements	O
as	O
well	O
as	O
the	O
metals	O
of	O
antiquity	O
)	O
through	O
a	O
device	O
they	O
construct	O
within	O
a	O
transmutation	O
engine	O
.	O
</s>
<s>
The	O
game	O
includes	O
Steam	B-Application
Workshop	O
support	O
to	O
allow	O
users	O
to	O
supply	O
their	O
own	O
puzzles	O
,	O
with	O
the	O
game	O
only	O
accepting	O
puzzles	O
that	O
the	O
user	O
has	O
shown	O
possible	O
to	O
complete	O
on	O
their	O
own	O
.	O
</s>
<s>
Zach	O
Barth	O
is	O
the	O
primary	O
developer	O
behind	O
Zachtronics	O
and	O
has	O
created	O
a	O
number	O
of	O
puzzle-driven	O
programming	B-Language
games	I-Language
.	O
</s>
<s>
Opus	B-Application
Magnum	I-Application
is	O
a	O
refined	O
version	O
of	O
Barth	O
's	O
first	O
game	O
,	O
The	O
Codex	O
of	O
Alchemical	O
Engineering	O
,	O
which	O
was	O
a	O
2008	O
browser	B-Protocol
game	I-Protocol
programmed	O
in	O
Adobe	B-Operating_System
Flash	I-Operating_System
.	O
</s>
<s>
While	O
Barth	O
led	O
the	O
programming	B-Language
effort	O
,	O
Matthew	O
Burns	O
was	O
the	O
writer	O
for	O
the	O
game	O
's	O
dialog	O
and	O
composed	O
its	O
music	O
.	O
</s>
<s>
For	O
Opus	B-Application
Magnum	I-Application
they	O
wanted	O
to	O
create	O
a	O
story	O
and	O
setting	O
to	O
help	O
drive	O
players	O
to	O
finish	O
puzzles	O
,	O
but	O
wanted	O
to	O
avoid	O
the	O
steampunk	O
nature	O
that	O
seemed	O
to	O
be	O
a	O
clear	O
fit	O
for	O
the	O
game	O
's	O
mechanics	O
.	O
</s>
<s>
One	O
driver	O
in	O
developing	O
Opus	B-Application
Magnum	I-Application
was	O
to	O
make	O
sure	O
players	O
could	O
make	O
animated	O
GIF	O
images	O
of	O
their	O
solutions	O
to	O
share	O
.	O
</s>
<s>
Barth	O
had	O
included	O
the	O
ability	O
for	O
players	O
to	O
record	O
their	O
solution	O
for	O
Infinifactory	B-Application
,	O
a	O
three-dimensional	O
block-based	O
game	O
,	O
but	O
these	O
images	O
required	O
viewers	O
to	O
have	O
some	O
spatial	O
concept	O
of	O
how	O
the	O
solution	O
was	O
laid	O
out	O
.	O
</s>
<s>
This	O
led	O
Barth	O
to	O
design	O
Opus	B-Application
Magnum	I-Application
to	O
be	O
inherently	O
GIF-able	O
with	O
seamlessly	O
repeating	O
loops	O
that	O
looked	O
appealing	O
and	O
required	O
little	O
other	O
context	O
for	O
viewers	O
to	O
understand	O
.	O
</s>
<s>
As	O
with	O
several	O
of	O
Barth	O
's	O
recent	O
titles	O
,	O
he	O
opted	O
to	O
release	O
a	O
near-completed	O
version	O
of	O
the	O
game	O
on	O
early	O
access	O
via	O
Steam	B-Application
prior	O
to	O
issuing	O
a	O
full	O
release	O
.	O
</s>
<s>
While	O
previous	O
games	O
from	O
the	O
developer	O
were	O
sold	O
on	O
both	O
Steam	B-Application
and	O
GOG.com,	O
the	O
latter	O
initially	O
declined	O
to	O
distribute	O
Opus	B-Application
Magnum	I-Application
due	O
to	O
its	O
resemblance	O
to	O
a	O
mobile	B-Application
game	I-Application
.	O
</s>
<s>
Opus	B-Application
Magnum	I-Application
received	O
generally	O
favorable	O
reviews	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
