<s>
Stride	B-Operating_System
(	O
formerly	O
Xenko	B-Operating_System
and	O
Paradox	O
)	O
is	O
a	O
free	B-License
and	I-License
open-source	I-License
2D	O
and	O
3D	O
cross-platform	B-Operating_System
game	O
engine	O
originally	O
developed	O
by	O
Silicon	O
Studio	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
to	O
create	O
video	O
games	O
for	O
PC	B-Device
,	O
mobile	B-Application
devices	I-Application
and	O
virtual	B-Application
reality	I-Application
.	O
</s>
<s>
Stride	B-Operating_System
,	O
then	O
called	O
Xenko	B-Operating_System
,	O
was	O
originally	O
made	O
available	O
by	O
Silicon	O
Studio	O
under	O
a	O
dual-license	B-License
model	O
,	O
available	O
to	O
anyone	O
under	O
GNU	O
GPLv3	O
,	O
with	O
alternative	O
,	O
for-pay	O
license	O
terms	O
available	O
for	O
those	O
for	O
whom	O
the	O
GPL	O
's	O
copyleft	B-License
terms	O
are	O
a	O
barrier	O
to	O
adoption	O
.	O
</s>
<s>
On	O
August	O
2	O
,	O
2018	O
,	O
developer	O
Virgile	O
Bello	O
announced	O
on	O
the	O
Xenko	B-Operating_System
blog	O
that	O
Silicon	O
Studio	O
had	O
dropped	O
support	O
of	O
the	O
project	O
and	O
relicensed	O
Xenko	B-Operating_System
3.0	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
Unlike	O
the	O
prior	O
dual-license	B-License
arrangement	O
whereby	O
the	O
engine	O
was	O
available	O
as	O
free	B-License
and	I-License
open-source	I-License
software	I-License
but	O
the	O
editor	O
remained	O
proprietary	B-Application
,	O
under	O
the	O
new	O
arrangement	O
both	O
the	O
engine	O
and	O
the	O
editor	O
are	O
available	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
Stride	B-Operating_System
is	O
a	O
C#	B-Application
suite	O
of	O
tools	O
to	O
create	O
games	O
.	O
</s>
<s>
It	O
is	O
also	O
a	O
full	O
game	O
engine	O
with	O
a	O
customizable	O
shader	O
system	O
intended	O
for	O
virtual	B-Application
reality	I-Application
game	O
development	O
.	O
</s>
<s>
The	O
game	O
engine	O
features	O
a	O
Physically-Based	O
Rendering	O
(	O
PBR	O
)	O
layered	O
material	O
editor	O
,	O
photorealistic	O
postprocess	O
effects	O
,	O
and	O
tools	O
such	O
as	O
a	O
particle	O
editor	O
,	O
a	O
scene	O
streaming	O
system	O
,	O
a	O
full	O
tool-chain	O
a	O
sprite	O
editor	O
,	O
a	O
scripting	O
editor	O
and	O
a	O
UI	B-Application
engine	O
.	O
</s>
<s>
Stride	B-Operating_System
is	O
also	O
a	O
cross-platform	B-Operating_System
runtime	O
supporting	O
iOS	B-Application
,	O
Android	B-Application
,	O
Windows	B-Device
UWP	I-Device
,	O
Linux	B-Application
,	O
and	O
PlayStation	O
4	O
.	O
</s>
<s>
It	O
creates	O
Visual	B-Application
Studio	I-Application
projects	O
,	O
allowing	O
for	O
easy	O
scripting	O
and	O
debugging	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
to	O
create	O
video	O
games	O
for	O
PC	B-Device
and	O
mobile	B-Application
devices	I-Application
,	O
and	O
virtual	B-Application
reality	I-Application
.	O
</s>
<s>
Stride	B-Operating_System
is	O
also	O
used	O
as	O
3D	O
rendering	O
engine	O
for	O
the	O
visual	O
programming	O
environment	O
vvvv	B-Application
gamma	O
.	O
</s>
<s>
The	O
engine	O
was	O
first	O
named	O
Paradox	O
and	O
was	O
then	O
renamed	O
Xenko	B-Operating_System
.	O
</s>
<s>
Xenko	B-Operating_System
is	O
taken	O
from	O
the	O
Japanese	O
word	O
zenko	O
which	O
means	O
perfection	O
and	O
light	O
.	O
</s>
<s>
It	O
was	O
renamed	O
Stride	B-Operating_System
in	O
2020	O
.	O
</s>
<s>
Xenko	B-Operating_System
's	O
first	O
public	O
release	O
,	O
Alpha	O
1.0	O
,	O
was	O
in	O
September	O
2014	O
.	O
</s>
<s>
It	O
went	O
open-source	B-Application
as	O
Xenko	B-Operating_System
on	O
GitHub	B-Application
in	O
October	O
2014	O
.	O
</s>
<s>
Xenko	B-Operating_System
beta	O
version	O
1.8x	O
was	O
released	O
out	O
of	O
beta	O
in	O
February	O
2017	O
.	O
</s>
<s>
On	O
March	O
1	O
,	O
2017	O
,	O
Microsoft	O
announced	O
that	O
Xenko	B-Operating_System
would	O
be	O
included	O
in	O
their	O
Xbox	B-Device
Creators	I-Device
Program	I-Device
and	O
Major	O
Nelson	O
reported	O
that	O
Xenko	B-Operating_System
would	O
be	O
one	O
of	O
the	O
supported	O
game	O
engines	O
with	O
"	O
out	O
of	O
the	O
box	O
"	O
support	O
for	O
UWP	O
.	O
</s>
<s>
In	O
April	O
2017	O
,	O
Silicon	O
Studio	O
launched	O
Xenko	B-Operating_System
2.0	O
under	O
a	O
commercial	O
proprietary	B-Application
license	I-Application
.	O
</s>
<s>
In	O
August	O
2018	O
,	O
Silicon	O
Studio	O
launched	O
Xenko	B-Operating_System
3.0	O
and	O
announced	O
the	O
end	O
of	O
their	O
support	O
for	O
the	O
engine	O
,	O
shifting	O
to	O
a	O
community-supported	O
model	O
.	O
</s>
<s>
On	O
November	O
11	O
,	O
2019	O
,	O
Xenko	B-Operating_System
version	O
3.1	O
was	O
released	O
.	O
</s>
<s>
In	O
April	O
2020	O
,	O
the	O
engine	O
was	O
renamed	O
to	O
Stride	B-Operating_System
because	O
the	O
developers	O
wanted	O
the	O
engine	O
to	O
join	O
the	O
.NET	O
Foundation	O
,	O
and	O
since	O
the	O
name	O
Xenko	B-Operating_System
was	O
property	O
of	O
Silicon	O
Studio	O
it	O
could	O
not	O
be	O
done	O
.	O
</s>
<s>
In	O
February	O
2021	O
,	O
Stride	B-Operating_System
4.0	O
was	O
released	O
.	O
</s>
<s>
In	O
July	O
2022	O
,	O
Stride	B-Operating_System
4.1	O
was	O
released	O
.	O
</s>
