<s>
Echo	B-Application
(	O
stylized	O
as	O
ECHO	B-Application
)	O
is	O
a	O
stealth	O
video	O
game	O
released	O
on	O
19	O
September	O
2017	O
.	O
</s>
<s>
The	O
game	O
takes	O
place	O
in	O
a	O
planetwide	O
palace	O
that	O
creates	O
echoes	B-Application
of	O
the	O
player	O
,	O
and	O
teaches	O
them	O
the	O
actions	O
of	O
the	O
player	O
.	O
</s>
<s>
ECHO	B-Application
is	O
a	O
science	O
fiction	O
story	O
in	O
a	O
future	O
where	O
advanced	O
technology	O
has	O
been	O
used	O
to	O
colonize	O
distant	O
planets	O
.	O
</s>
<s>
After	O
a	O
short	O
time	O
,	O
the	O
structure	O
begins	O
to	O
create	O
violent	O
,	O
mindless	O
clones	O
of	O
En	O
which	O
she	O
dubs	O
"	O
Echoes.	O
"	O
</s>
<s>
ECHO	B-Application
's	O
gameplay	O
revolves	O
around	O
an	O
adaptive	O
AI	O
function	O
.	O
</s>
<s>
Echoes	B-Application
serve	O
as	O
the	O
game	O
's	O
main	O
enemies	O
,	O
which	O
the	O
Palace	O
modifies	O
to	O
adapt	O
to	O
En	O
's	O
behavior	O
.	O
</s>
<s>
The	O
player	O
is	O
notified	O
of	O
their	O
actions	O
being	O
recorded	O
by	O
En	O
leaving	O
a	O
bright	O
outline	O
of	O
herself	O
behind	O
when	O
she	O
performs	O
an	O
action	B-Application
the	O
Palace	O
recognizes	O
.	O
</s>
<s>
Once	O
the	O
Blackout	O
occurs	O
,	O
all	O
recorded	O
actions	O
are	O
taught	O
to	O
the	O
Echoes	B-Application
,	O
and	O
previous	O
known	O
actions	O
are	O
deleted	O
.	O
</s>
<s>
For	O
example	O
,	O
if	O
En	O
is	O
seen	O
shooting	O
her	O
gun	O
,	O
vaulting	O
a	O
low	O
wall	O
and	O
opening	O
a	O
door	O
,	O
the	O
Echoes	B-Application
will	O
have	O
the	O
ability	O
to	O
do	O
the	O
same	O
in	O
the	O
next	O
cycle	O
.	O
</s>
<s>
However	O
,	O
existing	O
Echoes	B-Application
can	O
still	O
kill	O
them	O
.	O
</s>
<s>
ECHO	B-Application
received	O
"	O
generally	O
favorable	O
reviews	O
"	O
from	O
critics	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
