<s>
The	O
Blender	B-Application
Game	I-Application
Engine	I-Application
was	O
a	O
free	B-Application
and	I-Application
open-source	I-Application
3D	O
production	O
suite	O
used	O
for	O
making	O
real-time	O
interactive	O
content	O
.	O
</s>
<s>
It	O
was	O
previously	O
embedded	O
within	O
Blender	B-Application
,	O
but	O
support	O
for	O
it	O
was	O
dropped	O
in	O
2019	O
,	O
with	O
the	O
release	O
of	O
Blender	B-Application
2.8	O
.	O
</s>
<s>
The	O
game	O
engine	O
was	O
written	O
from	O
scratch	O
in	O
C++	B-Language
as	O
a	O
mostly	O
independent	O
component	O
,	O
and	O
includes	O
support	O
for	O
features	O
such	O
as	O
Python	B-Language
scripting	O
and	O
OpenAL	B-Application
3D	O
sound	O
.	O
</s>
<s>
Blender	B-Application
Game	I-Application
Engine	I-Application
was	O
developed	O
in	O
2000	O
with	O
the	O
goal	O
of	O
creating	O
a	O
marketable	O
commercial	O
product	O
to	O
create	O
games	O
and	O
other	O
interactive	O
content	O
,	O
in	O
an	O
artist-friendly	O
way	O
.	O
</s>
<s>
Key	O
code	O
in	O
the	O
physics	O
library	O
(	O
SUMO	O
)	O
did	O
not	O
become	O
open-source	B-License
when	O
the	O
rest	O
of	O
Blender	B-Application
did	O
,	O
which	O
prevented	O
the	O
game	O
engine	O
from	O
functioning	O
until	O
version	O
2.37a	O
.	O
</s>
<s>
Blender	B-Application
2.41	O
showcased	O
a	O
version	O
that	O
was	O
almost	O
entirely	O
devoted	O
to	O
the	O
game	O
engine	O
;	O
audio	O
was	O
supported	O
.	O
</s>
<s>
Version	O
2.42	O
showed	O
several	O
significant	O
new	O
features	O
,	O
including	O
integration	O
of	O
the	O
Bullet	B-Application
rigid-body	O
dynamics	O
library	O
.	O
</s>
<s>
A	O
new	O
system	O
for	O
integration	O
of	O
GLSL	B-Language
shaders	O
and	O
soft-body	O
physics	O
was	O
added	O
in	O
the	O
2.48	O
release	O
to	O
help	O
bring	O
the	O
game	O
engine	O
back	O
in	O
line	O
with	O
modern	O
game	O
engines	O
.	O
</s>
<s>
Like	O
Blender	B-Application
,	O
it	O
uses	O
OpenGL	B-Application
,	O
a	O
cross-platform	B-Operating_System
graphics	O
layer	O
,	O
to	O
communicate	O
with	O
graphics	O
hardware	O
.	O
</s>
<s>
During	O
the	O
2010	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
,	O
the	O
open-source	B-License
navigation	O
mesh	O
construction	O
and	O
pathfinding	O
libraries	O
Recast	O
and	O
Detour	O
were	O
integrated	O
;	O
the	O
work	O
was	O
merged	O
to	O
trunk	O
in	O
2011	O
.	O
</s>
<s>
Audaspace	O
was	O
coded	O
as	O
well	O
to	O
provide	O
a	O
Python	B-Language
handle	O
for	O
sound	O
control	O
.	O
</s>
<s>
This	O
library	O
uses	O
OpenAL	B-Application
or	O
SDL	B-Operating_System
as	O
a	O
backend	O
.	O
</s>
<s>
In	O
2019	O
,	O
with	O
the	O
release	O
of	O
Blender	B-Application
2.8	O
,	O
the	O
Blender	B-Application
Game	I-Application
Engine	I-Application
was	O
entirely	O
removed	O
from	O
Blender	B-Application
itself	O
.	O
</s>
<s>
The	O
engine	O
's	O
capabilities	O
and	O
appeal	O
had	O
largely	O
fallen	O
behind	O
other	O
rising	O
game	O
engines	O
of	O
the	O
time	O
,	O
and	O
it	O
was	O
difficult	O
to	O
update	O
both	O
Blender	B-Application
itself	O
alongside	O
the	O
game	O
engine	O
.	O
</s>
<s>
Users	O
were	O
instead	O
recommended	O
to	O
use	O
other	O
,	O
more	O
powerful	O
open	B-License
source	I-License
alternatives	O
,	O
like	O
Godot	B-Application
.	O
</s>
<s>
Following	O
its	O
removal	O
from	O
the	O
official	O
version	O
of	O
Blender	B-Application
,	O
an	O
unofficial	O
fork	O
of	O
the	O
game	O
engine	O
source	O
code	O
was	O
created	O
,	O
named	O
UPBGE	O
.	O
</s>
<s>
Since	O
then	O
,	O
UPBGE	O
has	O
been	O
updated	O
with	O
support	O
for	O
Blender	B-Application
's	O
new	O
realtime	O
renderer	O
,	O
Eevee	O
,	O
and	O
runs	O
on	O
top	O
of	O
Blender	B-Application
3.0	O
source	O
code	O
.	O
</s>
<s>
The	O
Blender	B-Application
Game	I-Application
Engine	I-Application
uses	O
a	O
system	O
of	O
graphical	O
"	O
logic	O
bricks	O
"	O
(	O
a	O
combination	O
of	O
"	O
sensors	O
"	O
,	O
"	O
controllers	O
"	O
and	O
"	O
actuators	O
"	O
)	O
to	O
control	O
the	O
movement	O
and	O
display	O
of	O
objects	O
.	O
</s>
<s>
The	O
game	O
engine	O
can	O
also	O
be	O
extended	O
via	O
a	O
set	O
of	O
Python	B-Language
bindings	O
.	O
</s>
<s>
Collision	O
detection	O
and	O
dynamics	O
simulation	O
now	O
support	O
Bullet	B-Application
Physics	I-Application
Library	O
.	O
</s>
<s>
Yo	B-Application
Frankie	I-Application
!	I-Application
</s>
