<s>
Commander	B-Application
Keen	I-Application
in	I-Application
Aliens	I-Application
Ate	I-Application
My	I-Application
Babysitter	I-Application
(	O
stylized	O
as	O
Aliens	B-Application
Ate	I-Application
My	I-Application
Babysitter	I-Application
!	I-Application
)	O
</s>
<s>
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
FormGen	O
in	O
December	O
1991	O
for	O
DOS	B-Device
.	O
</s>
<s>
It	O
is	O
the	O
seventh	O
episode	O
of	O
the	O
Commander	B-Application
Keen	I-Application
series	O
,	O
though	O
it	O
is	O
numbered	O
as	O
the	O
sixth	O
,	O
as	O
Commander	B-Application
Keen	I-Application
in	I-Application
Keen	I-Application
Dreams	I-Application
is	O
outside	O
of	O
the	O
main	O
continuity	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
as	O
he	O
journeys	O
through	O
an	O
alien	O
world	O
to	O
rescue	O
his	O
kidnapped	O
babysitter	O
.	O
</s>
<s>
After	O
the	O
success	O
of	O
the	O
three-episode	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>
During	O
development	O
,	O
the	O
last	O
episode	O
was	O
split	O
off	O
to	O
be	O
released	O
as	O
a	O
stand-alone	O
game	O
due	O
to	O
a	O
deal	O
made	O
by	O
id	O
's	O
new	O
president	O
,	O
Mark	O
Rein	O
,	O
with	O
the	O
remaining	O
two	O
episodes	O
produced	O
as	O
a	O
pair	O
titled	O
Commander	B-Application
Keen	I-Application
in	I-Application
Goodbye	I-Application
,	I-Application
Galaxy	I-Application
instead	O
.	O
</s>
<s>
It	O
did	O
not	O
sell	O
as	O
well	O
as	O
the	O
first	O
trilogy	O
,	O
which	O
was	O
attributed	O
by	O
id	O
to	O
poor	O
marketing	O
and	O
its	O
awkward	O
status	O
as	O
a	O
stand-alone	O
retail	O
game	O
in	O
a	O
series	O
known	O
for	O
groups	O
of	O
shareware	B-License
episodes	O
.	O
</s>
<s>
Although	O
another	O
Keen	O
game	O
was	O
planned	O
,	O
during	O
development	O
id	O
Software	O
began	O
work	O
on	O
Wolfenstein	B-Application
3D	I-Application
,	O
and	O
its	O
success	O
,	O
along	O
with	O
the	O
development	O
of	O
Doom	B-Application
,	O
led	O
id	O
to	O
not	O
develop	O
any	O
further	O
Keen	O
games	O
.	O
</s>
<s>
Commander	B-Application
Keen	I-Application
in	I-Application
Aliens	I-Application
Ate	I-Application
My	I-Application
Babysitter	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>
Upon	O
hearing	O
a	O
loud	O
noise	O
he	O
rushes	O
out	O
,	O
only	O
to	O
discover	O
her	O
missing	O
and	O
a	O
note	O
burnt	O
into	O
the	O
grass	O
stating	O
that	O
the	O
Bloogs	O
of	O
Fribbulus	O
Xax	O
have	O
taken	O
Molly	O
and	O
plan	O
to	O
eat	O
her	O
;	O
donning	O
his	O
helmet	O
as	O
Commander	B-Application
Keen	I-Application
,	O
Billy	O
rushes	O
off	O
to	O
save	O
her	O
before	O
his	O
parents	O
get	O
home	O
.	O
</s>
<s>
Keen	O
is	O
surprised	O
,	O
as	O
he	O
thought	O
Mortimer	O
was	O
dead	O
(	O
he	O
was	O
apparently	O
killed	O
at	O
the	O
end	O
of	O
the	O
Vorticon	B-Application
trilogy	O
)	O
,	O
and	O
is	O
dismayed	O
to	O
find	O
out	O
that	O
Mortimer	O
plans	O
to	O
blow	O
up	O
the	O
entire	O
universe	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
Vorticons	B-Application
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
quit	O
Softdisk	O
and	O
started	O
their	O
own	O
company	O
,	O
id	O
Software	O
.	O
</s>
<s>
As	O
the	O
team	O
began	O
to	O
explore	O
creating	O
another	O
set	O
of	O
Commander	B-Application
Keen	I-Application
games	O
,	O
they	O
made	O
a	O
prototype	O
game	O
for	O
Softdisk	O
,	O
Commander	B-Application
Keen	I-Application
in	I-Application
Keen	I-Application
Dreams	I-Application
,	O
to	O
fulfill	O
their	O
obligations	O
while	O
also	O
helping	O
improve	O
the	O
next	O
full	O
set	O
of	O
Keen	O
games	O
.	O
</s>
<s>
For	O
Vorticons	B-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>
The	O
team	O
reprised	O
their	O
roles	O
for	O
subsequent	O
Keen	O
games	O
,	O
with	O
the	O
addition	O
of	O
programmer	O
Jason	O
Blochowiak	O
for	O
Galaxy	O
and	O
Aliens	O
,	O
and	O
changed	O
the	O
game	O
engine	O
and	O
design	O
for	O
the	O
next	O
Keen	O
games	O
:	O
an	O
increase	O
in	O
graphical	O
quality	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>
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>
In	O
June	O
1991	O
,	O
with	O
Dreams	O
completed	O
,	O
the	O
id	O
team	O
began	O
working	O
on	O
another	O
trilogy	O
of	O
Commander	B-Application
Keen	I-Application
episodes	O
.	O
</s>
<s>
By	O
August	O
they	O
had	O
completed	O
a	O
beta	O
version	O
of	O
episode	O
four	O
,	O
"	O
Secret	B-Application
of	I-Application
the	I-Application
Oracle	I-Application
"	O
,	O
and	O
Romero	O
sent	O
it	O
off	O
to	O
a	O
fan	O
he	O
had	O
met	O
from	O
Canada	O
,	O
Mark	O
Rein	O
,	O
who	O
had	O
offered	O
to	O
play-test	O
the	O
game	O
.	O
</s>
<s>
Within	O
a	O
few	O
weeks	O
of	O
being	O
hired	O
,	O
Rein	O
made	O
a	O
deal	O
to	O
get	O
id	O
into	O
the	O
commercial	O
market	O
:	O
to	O
take	O
the	O
sixth	O
episode	O
and	O
make	O
it	O
a	O
stand-alone	O
game	O
,	O
published	O
as	O
a	O
retail	O
title	O
through	O
FormGen	O
instead	O
of	O
part	O
of	O
a	O
shareware	B-License
trilogy	O
.	O
</s>
<s>
They	O
signed	O
the	O
deal	O
,	O
but	O
Scott	O
Miller	O
of	O
Apogee	O
was	O
dismayed	O
;	O
he	O
felt	O
that	O
not	O
having	O
a	O
full	O
trilogy	O
for	O
the	O
shareware	B-License
game	O
would	O
hurt	O
sales	O
.	O
</s>
<s>
As	O
it	O
grew	O
colder	O
,	O
they	O
increasingly	O
spent	O
all	O
of	O
their	O
time	O
in	O
the	O
apartment	O
,	O
making	O
the	O
games	O
,	O
and	O
designing	O
a	O
game	O
that	O
would	O
later	O
become	O
Wolfenstein	B-Application
3D	I-Application
.	O
</s>
<s>
As	O
Aliens	O
had	O
a	O
different	O
publisher	O
and	O
schedule	O
than	O
Galaxy	O
,	O
it	O
was	O
released	O
as	O
the	O
sixth	O
episode	O
of	O
the	O
series	O
but	O
was	O
actually	O
developed	O
prior	O
to	O
the	O
fifth	O
,	O
"	O
The	B-Application
Armageddon	I-Application
Machine	I-Application
"	O
.	O
</s>
<s>
Despite	O
this	O
,	O
the	O
sales	O
were	O
strong	O
enough	O
that	O
id	O
agreed	O
to	O
use	O
FormGen	O
as	O
the	O
publisher	O
for	O
their	O
next	O
retail	O
title	O
,	O
the	O
"	O
Spear	B-Application
of	I-Application
Destiny	I-Application
"	O
episode	O
of	O
Wolfenstein	B-Application
3D	I-Application
.	O
</s>
<s>
A	O
description	O
of	O
the	O
shareware	B-License
market	O
in	O
the	O
first	O
issue	O
of	O
PC	O
Zone	O
in	O
1993	O
noted	O
that	O
Aliens	O
,	O
as	O
it	O
was	O
also	O
sold	O
through	O
shareware	B-License
distributors	O
like	O
Apogee	O
,	O
was	O
one	O
of	O
the	O
most	O
popular	O
games	O
of	O
1993	O
in	O
the	O
shareware	B-License
market	O
.	O
</s>
<s>
A	O
short	O
review	O
in	O
the	O
same	O
issue	O
as	O
part	O
of	O
a	O
listing	O
of	O
shareware	B-License
games	I-License
that	O
could	O
be	O
ordered	O
through	O
the	O
magazine	O
called	O
Aliens	O
the	O
"	O
special	O
edition	O
"	O
of	O
the	O
series	O
and	O
"	O
the	O
best	O
one	O
yet	O
"	O
.	O
</s>
<s>
The	O
game	O
won	O
the	O
"	O
Best	O
Entertainment	O
Program	O
"	O
and	O
"	O
Best	O
Overall	O
Program	O
"	O
categories	O
at	O
the	O
1992	O
Shareware	B-Application
Industry	I-Application
Awards	I-Application
.	O
</s>
<s>
A	O
review	O
of	O
the	O
entire	O
Commander	B-Application
Keen	I-Application
series	O
in	O
1993	O
by	O
Sandy	O
Petersen	O
in	O
the	O
first	O
"	O
Eye	O
of	O
the	O
Monitor	O
"	O
column	O
for	O
Dragon	O
described	O
the	O
series	O
as	O
action	O
games	O
with	O
"	O
hilarious	O
graphics	O
"	O
.	O
</s>
<s>
After	O
Aliens	O
,	O
id	O
Software	O
did	O
not	O
produce	O
any	O
more	O
games	O
in	O
the	O
Commander	B-Application
Keen	I-Application
series	O
besides	O
the	O
co-developed	O
Galaxy	O
.	O
</s>
<s>
Another	O
trilogy	O
of	O
episodes	O
,	O
titled	O
The	O
Universe	O
Is	O
Toast	O
,	O
was	O
planned	O
for	O
December	O
1992	O
,	O
but	O
was	O
cancelled	O
after	O
the	O
success	O
of	O
id	O
's	O
Wolfenstein	B-Application
3D	I-Application
and	O
development	O
focus	O
on	O
Doom	B-Application
.	O
</s>
<s>
A	O
final	O
Keen	O
game	O
,	O
Commander	B-Application
Keen	I-Application
,	O
was	O
developed	O
for	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
in	O
2001	O
by	O
David	O
A	O
.	O
Palmer	O
Productions	O
in	O
association	O
with	O
id	O
Software	O
,	O
and	O
published	O
by	O
Activision	O
.	O
</s>
<s>
Aliens	O
was	O
included	O
with	O
the	O
other	O
id-developed	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
it	O
was	O
not	O
included	O
in	O
the	O
1998	O
Apogee	O
Commander	B-Application
Keen	I-Application
compilation	O
release	O
,	O
or	O
the	O
2014	O
3D	O
Realms	O
Anthology	O
release	O
.	O
</s>
