<s>
Dolphin	B-Application
is	O
a	O
side-scrolling	O
video	O
game	O
created	O
by	O
Matthew	O
Hubbard	O
for	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
and	O
released	O
by	O
Activision	O
in	O
1983	B-Application
.	O
</s>
<s>
Hubbard	O
later	O
designed	O
Zenji	B-Application
for	O
Activision	O
.	O
</s>
<s>
Dolphin	B-Application
requires	O
the	O
player	O
to	O
use	O
audio	O
cues	O
in	O
order	O
to	O
survive	O
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
dolphin	B-Application
attempting	O
to	O
flee	O
from	O
a	O
giant	O
squid	O
.	O
</s>
<s>
It	O
must	O
avoid	O
colliding	O
with	O
packs	O
of	O
seahorses	O
while	O
navigating	O
both	O
forward	O
-	O
and	O
backward-moving	O
currents	O
(	O
indicated	O
by	O
arrows	O
pointed	O
with	O
or	O
against	O
the	O
dolphin	B-Application
's	O
direction	O
,	O
respectively	O
)	O
which	O
accelerate	O
or	O
decelerate	O
its	O
speed	O
.	O
</s>
<s>
During	O
this	O
time	O
,	O
the	O
dolphin	B-Application
is	O
able	O
to	O
touch	O
the	O
squid	O
and	O
drive	O
it	O
away	O
.	O
</s>
<s>
The	O
dolphin	B-Application
's	O
sonar	O
sounds	O
to	O
indicate	O
how	O
to	O
avoid	O
seahorses	O
:	O
a	O
high	O
pitch	O
indicates	O
an	O
opening	O
near	O
the	O
water	O
's	O
surface	O
,	O
and	O
a	O
lower	O
resonance	O
indicates	O
a	O
seafloor	O
passage	O
.	O
</s>
<s>
Dolphin	B-Application
won	O
the	O
"	O
Best	O
Videogame	O
Audio/Visual	O
Effects	O
(	O
Less	O
than	O
16K	O
ROM	O
)	O
"	O
category	O
in	O
the	O
Electronic	O
Games	O
1984	O
Arcade	O
Awards	O
.	O
</s>
