<s>
A	B-Application
Slower	I-Application
Speed	I-Application
of	I-Application
Light	I-Application
is	O
a	O
freeware	B-License
video	O
game	O
developed	O
by	O
MIT	O
Game	O
Lab	O
that	O
demonstrates	O
the	O
effects	O
of	O
special	O
relativity	O
by	O
gradually	O
slowing	O
down	O
the	O
speed	O
of	O
light	O
to	O
a	O
walking	O
pace	O
.	O
</s>
<s>
The	O
game	O
runs	O
on	O
the	O
Unity	B-Application
engine	I-Application
using	O
its	O
open-source	B-Application
OpenRelativity	O
toolkit	O
.	O
</s>
<s>
In	O
A	B-Application
Slower	I-Application
Speed	I-Application
of	I-Application
Light	I-Application
,	O
the	O
player	O
controls	O
the	O
ghost	O
of	O
a	O
young	O
child	O
who	O
was	O
killed	O
in	O
an	O
unspecified	O
accident	O
.	O
</s>
<s>
OpenRelativity	O
is	O
a	O
toolkit	O
designed	O
for	O
use	O
with	O
the	O
proprietary	O
Unity	B-Application
game	I-Application
engine	I-Application
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
MIT	O
Game	O
Lab	O
during	O
the	O
development	O
of	O
A	B-Application
Slower	I-Application
Speed	I-Application
of	I-Application
Light	I-Application
.	O
</s>
<s>
It	O
is	O
hosted	O
on	O
GitHub	B-Application
and	O
has	O
been	O
published	O
under	O
the	O
permissive	B-License
MIT	B-License
license	I-License
.	O
</s>
<s>
A	B-Application
Slower	I-Application
Speed	I-Application
of	I-Application
Light	I-Application
was	O
developed	O
in	O
hopes	O
of	O
being	O
used	O
as	O
an	O
educational	O
tool	O
to	O
explain	O
special	O
relativity	O
in	O
an	O
easy-to-understand	O
fashion	O
.	O
</s>
