<s>
Commander	B-Application
Keen	I-Application
in	I-Application
Keen	I-Application
Dreams	I-Application
is	O
a	O
side-scrolling	O
platform	O
video	O
game	O
developed	O
by	O
id	O
Software	O
and	O
published	O
by	O
Softdisk	O
in	O
1991	O
for	O
DOS	B-Device
.	O
</s>
<s>
It	O
is	O
the	O
fourth	O
episode	O
of	O
the	O
Commander	B-Application
Keen	I-Application
series	O
.	O
</s>
<s>
The	O
game	O
follows	O
the	O
titular	O
Commander	B-Application
Keen	I-Application
,	O
an	O
eight-year-old	O
child	O
genius	O
,	O
in	O
an	O
adventure	O
in	O
his	O
dreams	O
as	O
he	O
journeys	O
through	O
a	O
vegetable	O
kingdom	O
to	O
defeat	O
the	O
evil	O
potato	O
king	O
Boobus	O
Tuber	O
and	O
free	O
enslaved	O
children	O
from	O
the	O
Dream	O
machine	O
.	O
</s>
<s>
After	O
the	O
success	O
of	O
Commander	B-Application
Keen	I-Application
in	I-Application
Invasion	I-Application
of	I-Application
the	I-Application
Vorticons	I-Application
,	O
the	O
developers	O
of	O
the	O
game	O
,	O
including	O
programmers	O
John	O
Carmack	O
and	O
John	O
Romero	O
,	O
designer	O
Tom	O
Hall	O
,	O
and	O
artist	O
Adrian	O
Carmack	O
,	O
left	O
their	O
jobs	O
at	O
Softdisk	O
to	O
found	O
id	O
Software	O
.	O
</s>
<s>
As	O
a	O
part	O
of	O
fulfilling	O
this	O
obligation	O
,	O
id	O
made	O
Keen	B-Application
Dreams	I-Application
as	O
a	O
prototype	O
to	O
develop	O
ideas	O
for	O
their	O
next	O
major	O
Keen	O
game	O
,	O
Commander	B-Application
Keen	I-Application
in	I-Application
Goodbye	I-Application
,	I-Application
Galaxy	I-Application
.	O
</s>
<s>
Keen	B-Application
Dreams	I-Application
was	O
not	O
as	O
widely	O
played	O
or	O
noted	O
as	O
the	O
other	O
Keen	O
games	O
,	O
and	O
as	O
it	O
was	O
owned	O
by	O
Softdisk	O
was	O
included	O
in	O
only	O
one	O
of	O
the	O
several	O
compilation	O
releases	O
of	O
the	O
series	O
by	O
id	O
or	O
regular	O
publisher	O
Apogee	O
Software	O
;	O
as	O
a	O
result	O
,	O
it	O
became	O
known	O
as	O
the	O
"	O
lost	O
episode	O
"	O
of	O
the	O
series	O
.	O
</s>
<s>
In	O
2013	O
a	O
port	O
was	O
developed	O
by	O
Super	O
Fighter	O
Team	O
for	O
Android	B-Application
devices	O
.	O
</s>
<s>
A	O
2014	O
Indiegogo	O
crowdfunding	O
campaign	O
led	O
to	O
the	O
original	O
source	O
code	O
being	O
published	O
and	O
a	O
release	O
by	O
Hard	O
Disk	O
Publishing	O
through	O
Steam	B-Application
for	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
in	O
2015	O
,	O
and	O
OS	B-Operating_System
X	I-Operating_System
in	O
2016	O
.	O
</s>
<s>
A	O
Nintendo	B-Application
Switch	I-Application
version	O
by	O
Lone	O
Wolf	O
Technology	O
was	O
released	O
in	O
2019	O
.	O
</s>
<s>
An	O
expanded	O
version	O
was	O
released	O
in	O
2020	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
and	O
Wii	B-Device
U	I-Device
by	O
Diplodocus	O
Games	O
and	O
in	O
2021	O
for	O
Windows	B-Application
by	O
the	O
Keen	O
Company	O
under	O
the	O
title	O
"	O
Commander	B-Application
Keen	I-Application
in	I-Application
Keen	I-Application
Dreams	I-Application
:	O
Definitive	O
Edition	O
"	O
,	O
featuring	O
additional	O
levels	O
and	O
new	O
music	O
.	O
</s>
<s>
Commander	B-Application
Keen	I-Application
in	I-Application
Keen	I-Application
Dreams	I-Application
is	O
a	O
side-scrolling	O
platform	O
video	O
game	O
:	O
the	O
majority	O
of	O
the	O
game	O
features	O
the	O
player-controlled	O
Commander	B-Application
Keen	I-Application
viewed	O
from	O
the	O
side	O
while	O
moving	O
on	O
a	O
two-dimensional	O
plane	O
.	O
</s>
<s>
The	O
player	O
character	O
can	O
move	O
left	O
and	O
right	O
and	O
can	O
jump	O
;	O
unlike	O
the	O
prior	O
trilogy	O
of	O
episodes	O
in	O
the	O
series	O
,	O
known	O
collectively	O
as	O
Commander	B-Application
Keen	I-Application
in	I-Application
Invasion	I-Application
of	I-Application
the	I-Application
Vorticons	I-Application
,	O
Keen	O
cannot	O
jump	O
higher	O
using	O
a	O
pogo	O
stick	O
.	O
</s>
<s>
Once	O
entered	O
,	O
the	O
only	O
way	O
to	O
exit	O
a	O
level	O
is	O
to	O
reach	O
the	O
end	O
,	O
though	O
unlike	O
in	O
Vorticons	B-Application
the	O
player	O
can	O
save	O
their	O
game	O
at	O
any	O
point	O
.	O
</s>
<s>
Having	O
defeated	O
the	O
Grand	O
Intellect	O
in	O
Invasion	B-Application
of	I-Application
the	I-Application
Vorticons	I-Application
and	O
saved	O
the	O
Earth	O
,	O
eight-year-old	O
child	O
genius	O
Billy	O
Blaze	O
is	O
still	O
forced	O
by	O
his	O
parents	O
to	O
eat	O
his	O
vegetables	O
at	O
dinner	O
.	O
</s>
<s>
Keen	O
puts	O
on	O
his	O
Commander	B-Application
Keen	I-Application
helmet	O
and	O
defeats	O
the	O
vegetables	O
,	O
but	O
finds	O
that	O
his	O
raygun	O
is	O
now	O
out	O
of	O
charge	O
.	O
</s>
<s>
Another	O
child	O
in	O
chains	O
runs	O
up	O
to	O
him	O
and	O
asks	O
Keen	O
to	O
defeat	O
Boobus	O
Tuber	O
and	O
save	O
them	O
all	O
from	O
the	O
Dream	O
Machine	O
,	O
and	O
Commander	B-Application
Keen	I-Application
agrees	O
to	O
do	O
so	O
.	O
</s>
<s>
In	O
October	O
—	O
December	O
1990	O
,	O
a	O
team	O
of	O
employees	O
from	O
programming	O
studio	O
Softdisk	O
,	O
calling	O
themselves	O
Ideas	O
from	O
the	O
Deep	O
,	O
developed	O
the	O
three-part	O
video	O
game	O
Commander	B-Application
Keen	I-Application
in	I-Application
Invasion	I-Application
of	I-Application
the	I-Application
Vorticons	I-Application
.	O
</s>
<s>
After	O
the	O
release	O
of	O
the	O
game	O
in	O
December	O
,	O
and	O
the	O
arrival	O
of	O
the	O
first	O
US$	O
10,500	O
royalty	O
check	O
from	O
shareware	B-License
publisher	O
Apogee	O
Software	O
,	O
the	O
team	O
planned	O
to	O
quit	O
Softdisk	O
and	O
start	O
their	O
own	O
company	O
.	O
</s>
<s>
Ideas	O
from	O
the	O
Deep	O
,	O
now	O
founded	O
as	O
id	O
Software	O
,	O
used	O
some	O
of	O
these	O
games	O
to	O
prototype	O
ideas	O
for	O
their	O
own	O
releases	O
,	O
such	O
as	O
Catacomb	B-Application
3-D	I-Application
.	O
</s>
<s>
In	O
late	O
spring	O
of	O
1991	O
they	O
worked	O
on	O
a	O
new	O
Keen	O
game	O
in	O
order	O
to	O
develop	O
new	O
systems	O
for	O
their	O
next	O
major	O
release	O
in	O
the	O
Commander	B-Application
Keen	I-Application
series	O
.	O
</s>
<s>
For	O
Invasion	B-Application
of	I-Application
the	I-Application
Vorticons	I-Application
,	O
John	O
Carmack	O
and	O
Romero	O
focused	O
exclusively	O
on	O
the	O
programming	O
,	O
while	O
Adrian	O
Carmack	O
joined	O
late	O
in	O
development	O
and	O
had	O
a	O
personal	O
art	O
style	O
that	O
did	O
not	O
match	O
with	O
the	O
game	O
.	O
</s>
<s>
For	O
Keen	B-Application
Dreams	I-Application
,	O
the	O
team	O
reprised	O
their	O
roles	O
,	O
and	O
used	O
the	O
game	O
as	O
a	O
prototype	O
for	O
what	O
they	O
wanted	O
to	O
change	O
for	O
the	O
next	O
Keen	O
games	O
for	O
Apogee	O
:	O
an	O
increase	O
in	O
graphical	O
quality	O
with	O
parallax	O
scrolling	O
to	O
make	O
the	O
background	O
move	O
at	O
a	O
different	O
speed	O
than	O
the	O
foreground	O
,	O
a	O
pseudo-3D	O
view	O
rather	O
than	O
a	O
side-on	O
view	O
,	O
ramps	O
rather	O
than	O
solely	O
flat	O
surfaces	O
,	O
support	O
for	O
sound	B-Device
cards	I-Device
,	O
and	O
changes	O
to	O
the	O
design	O
based	O
on	O
player	O
feedback	O
.	O
</s>
<s>
For	O
Vorticons	B-Application
,	O
Carmack	O
had	O
created	O
adaptive	O
tile	O
refresh	O
to	O
produce	O
a	O
scrolling	O
effect	O
on	O
computers	O
not	O
powerful	O
enough	O
to	O
redraw	O
the	O
entire	O
screen	O
when	O
the	O
player	O
moved	O
.	O
</s>
<s>
For	O
Keen	B-Application
Dreams	I-Application
,	O
he	O
wanted	O
to	O
scroll	O
the	O
background	O
at	O
a	O
different	O
rate	O
than	O
the	O
foreground	O
,	O
but	O
again	O
computers	O
of	O
the	O
time	O
were	O
not	O
powerful	O
enough	O
to	O
do	O
so	O
smoothly	O
.	O
</s>
<s>
Hall	O
,	O
meanwhile	O
,	O
had	O
received	O
feedback	O
from	O
parents	O
who	O
did	O
not	O
like	O
that	O
the	O
enemies	O
in	O
Vorticons	B-Application
left	O
behind	O
corpses	O
instead	O
of	O
disappearing	O
like	O
in	O
other	O
games	O
;	O
he	O
did	O
not	O
want	O
the	O
violence	O
to	O
have	O
no	O
effects	O
,	O
and	O
so	O
in	O
Dreams	O
replaced	O
the	O
raygun	O
with	O
pellets	O
that	O
temporarily	O
stunned	O
enemies	O
.	O
</s>
<s>
Once	O
the	O
game	O
engine	O
and	O
design	O
changes	O
were	O
completed	O
,	O
Keen	B-Application
Dreams	I-Application
was	O
completed	O
in	O
less	O
than	O
a	O
month	O
even	O
as	O
the	O
team	O
simultaneously	O
worked	O
on	O
another	O
game	O
.	O
</s>
<s>
Bobby	O
Prince	O
had	O
planned	O
out	O
an	O
introductory	O
cinematic	O
with	O
an	O
accompanying	O
song	O
titled	O
"	O
Eat	O
Your	O
Vegetables	O
"	O
,	O
but	O
it	O
was	O
rejected	O
as	O
it	O
would	O
have	O
made	O
the	O
game	O
too	O
large	O
to	O
fit	O
on	O
a	O
single	O
floppy	B-Device
disk	I-Device
.	O
</s>
<s>
The	O
story	O
introduction	O
was	O
instead	O
done	O
in	O
plain	O
text	O
,	O
and	O
"	O
Eat	O
Your	O
Vegetables	O
"	O
was	O
repurposed	O
as	O
stage	O
music	O
for	O
Commander	B-Application
Keen	I-Application
in	I-Application
Goodbye	I-Application
,	I-Application
Galaxy	I-Application
.	O
</s>
<s>
As	O
one	O
of	O
a	O
series	O
of	O
minor	O
PC	O
releases	O
from	O
the	O
small	O
publisher	O
Softdisk	O
,	O
Keen	B-Application
Dreams	I-Application
did	O
not	O
receive	O
much	O
attention	O
from	O
contemporary	O
reviewers	O
or	O
players	O
,	O
despite	O
its	O
connection	O
to	O
the	O
Commander	B-Application
Keen	I-Application
series	O
.	O
</s>
<s>
As	O
it	O
fell	O
between	O
the	O
1990	O
episodes	O
1	O
–	O
3	O
of	O
the	O
Vorticon	B-Application
trilogy	O
,	O
and	O
the	O
1991	O
episodes	O
4	O
–	O
5	O
of	O
Commander	B-Application
Keen	I-Application
in	I-Application
Goodbye	I-Application
,	I-Application
Galaxy	I-Application
,	O
Keen	B-Application
Dreams	I-Application
has	O
also	O
been	O
informally	O
referred	O
to	O
as	O
"	O
Episode	O
3.5	B-Device
"	I-Device
of	O
the	O
series	O
.	O
</s>
<s>
Keen	B-Application
Dreams	I-Application
was	O
also	O
marketed	O
by	O
Softdisk	O
as	O
part	O
of	O
"	O
The	O
Lost	O
Game	O
Collection	O
of	O
ID	O
Software	O
"	O
.	O
</s>
<s>
Keen	B-Application
Dreams	I-Application
was	O
included	O
with	O
the	O
other	O
series	O
games	O
in	O
the	O
1996	O
id	O
Anthology	O
compilation	O
release	O
,	O
but	O
as	O
the	O
game	O
had	O
not	O
been	O
published	O
through	O
Apogee	O
,	O
Keen	B-Application
Dreams	I-Application
was	O
not	O
included	O
in	O
the	O
1998	O
Apogee	O
Commander	B-Application
Keen	I-Application
compilation	O
release	O
or	O
the	O
2014	O
3D	O
Realms	O
Anthology	O
release	O
.	O
</s>
<s>
In	O
June	O
2013	O
,	O
developer	O
Super	O
Fighter	O
Team	O
licensed	O
the	O
game	O
from	O
Flat	O
Rock	O
Software	O
,	O
the	O
then-owners	O
of	O
Softdisk	O
,	O
and	O
released	O
a	O
version	O
for	O
Android	B-Application
devices	O
.	O
</s>
<s>
The	O
campaign	O
did	O
not	O
reach	O
the	O
goal	O
,	O
but	O
it	O
's	O
creator	O
Javier	O
Chavez	O
made	O
up	O
the	O
difference	O
,	O
and	O
the	O
source	O
code	O
was	O
released	O
under	O
GNU	B-License
GPL-2.0-or-later	I-License
soon	O
after	O
.	O
</s>
<s>
The	O
game	O
was	O
then	O
published	O
on	O
Steam	B-Application
through	O
the	O
Steam	B-Application
Greenlight	O
program	O
by	O
Hard	O
Disk	O
Publishing	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
and	O
Linux	B-Application
,	O
with	O
Steam	B-Application
achievements	O
and	O
multiple	O
graphical	O
options	O
.	O
</s>
<s>
According	O
to	O
Steam	B-Application
Spy	O
,	O
approximately	O
80,000	O
copies	O
have	O
been	O
sold	O
through	O
Steam	B-Application
as	O
of	O
June	O
2016	O
.	O
</s>
<s>
In	O
February	O
2019	O
,	O
Lone	O
Wolf	O
Technology	O
released	O
a	O
version	O
on	O
the	O
Nintendo	B-Application
Switch	I-Application
console	O
.	O
</s>
<s>
Commander	B-Application
Keen	I-Application
in	I-Application
Keen	I-Application
Dreams	I-Application
:	O
Definitive	O
Edition	O
is	O
another	O
conversion	O
released	O
by	O
Diplodocus	O
Games	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
and	O
Wii	B-Device
U	I-Device
in	O
2020	O
.	O
</s>
<s>
In	O
2021	O
,	O
Javier	O
Chavez	O
as	O
Keen	O
Company	O
released	O
the	O
"	O
Definitive	O
Edition	O
"	O
for	O
Windows	B-Application
.	O
</s>
